US20090126792A1 - Thin film solar concentrator/collector - Google Patents
Thin film solar concentrator/collector Download PDFInfo
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- US20090126792A1 US20090126792A1 US11/941,851 US94185107A US2009126792A1 US 20090126792 A1 US20090126792 A1 US 20090126792A1 US 94185107 A US94185107 A US 94185107A US 2009126792 A1 US2009126792 A1 US 2009126792A1
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- light
- light guide
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- prismatic features
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/12—Light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S2023/88—Multi reflective traps
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
Definitions
- the present invention relates to the field of light collectors and concentrators and more particularly to using micro-structured thin films to collect and concentrate solar radiation.
- Solar energy is a renewable source of energy that can be converted into other forms of energy such as heat and electricity.
- Major drawbacks in using solar energy as a reliable source of renewable energy are low efficiency in converting light energy to heat or electricity and the variation in the solar energy depending on the time of the day and the month of the year.
- PV Photovoltaic
- Systems using PV cells can have conversion efficiencies between 10-20%.
- PV cells can be made very thin and are not big and bulky as other devices that use solar energy.
- PV cells can range in size from a few millimeters to 10's of centimeters.
- the individual electrical output from one PV cell may range from a few milliWatts to a few Watts.
- Several PV cells may be connected electrically and packaged to produce a sufficient amount of electricity.
- Solar concentrators can be used to collect and focus solar energy to achieve higher conversion efficiency in PV cells.
- parabolic mirrors can be used to collect and focus light on a device that converts light energy in to heat and electricity.
- Other types of lenses and mirrors can also be used to significantly increase the conversion efficiency but they do not overcome the variation in amount of solar energy received depending on time of the day, month of the year or weather conditions. Further the systems employing lenses/mirrors tend to be bulky and heavy because the lenses and mirrors that are required to efficiently collect and focus sunlight have to be large.
- PV cells can be used in wide range of applications such as providing power to satellites and space shuttles, providing electricity to residential and commercial properties, charging automobile batteries and other navigation instruments.
- the performance of the PV cell depends on sunlight thus the conversion efficiency of PV cells, similar to other devices using solar energy depends on the time of day, month of the year and daily weather conditions.
- light collectors and concentrators that collect and focus light on the PV cell and track the movement of the sun through the day.
- Such systems are complicated, often bulky and large. For many applications it is also desirable that these light collectors and/or concentrators are compact in size.
- the light guide may include surface relief features to redirect incident light and propagate it through the light guide by multiple total internal reflections.
- the surface relief features may comprise facets that reflect light. In some embodiments, the facets may be angled with respect to each other.
- the photocell is optically coupled to the light guide. In some embodiments the photocell may be disposed adjacent to the light guide. In some other embodiments, the photocell may be disposed at one corner of the light guide. In yet other embodiments, the photocell may be disposed below the light guide.
- the light guide may be disposed on a substrate.
- the substrate may comprise glass, plastic, electrochromic glass, smart glass, etc.
- a device for collecting solar energy comprises a first light guide having top and bottom surfaces, said light guide guiding light therein by multiple total internal reflections at said top and bottom surfaces.
- the device further comprises a photocell optically coupled to the first light guide.
- a plurality of prismatic features is disposed on the first light guide to redirect ambient light received through said top surface such that said light is guided in the light guide by total internal reflection from said top and bottom surfaces to said photocell.
- the prismatic features may comprise elongate grooves.
- the elongate grooves may be straight.
- the elongate grooves may be curved.
- the prismatic features may comprise pits. In one embodiment, the pits may be conical.
- the device may comprise a first light guide further comprising a prismatic film disposed over a substrate and said film including said plurality of prismatic features therein.
- said prismatic features may be at said bottom surface of said first light guide.
- the prismatic features may extend along a plurality of parallel linear paths.
- the prismatic features may extend along plurality of. concentric circular curved paths.
- the prismatic features extend along a plurality of elliptical curved paths.
- the first light guide comprises a first layer comprising said first set of prismatic features; and a second layer comprising a second set of prismatic features.
- at least some of the prismatic features in the first layer are laterally offset with respect to some of the prismatic features in the second layer.
- at least some of the prismatic features in the first layer are shaped differently than some of the prismatic features in the second layer.
- a second light guide having top and bottom surfaces and including a plurality of edges between said top and bottom surfaces is disposed below the first light guide.
- the second light guide comprises a plurality of prismatic features to redirect light received through said bottom surface such that light is guided in the second light guide by total internal reflection from said top and bottom surfaces. The light that is guided in the second light guide is directed towards a photocell.
- a device for collecting solar energy comprises a first means for guiding light, said first means having first and second means for reflecting light, such that light is guided within said means for guiding light by multiple total internal reflections at said first and second light reflecting means.
- the device further comprises a means for converting light energy into alternate forms of energy; and a means for redirecting ambient light received through said first and second light reflecting means such that said light is guided in the means for guiding light by total internal reflection from said first and second light reflecting means to said means for converting light energy into electrical energy.
- the first and second light reflecting means may comprise the top and bottom surface of the light guiding means. A plurality of edges may be disposed between the top and bottom surface of the light guiding means.
- a method of manufacturing a device for collecting solar energy comprises providing a first light guide, said first light guide having top and bottom surfaces.
- the method further comprises providing a photocell such that the first light guide is optically coupled to the photocell; and forming a plurality of prismatic features on one of the top or bottom surfaces of said first light guide.
- a device for collecting ambient light comprises a first means for guiding light; said first means having first and second means for reflecting light such that light is guided within said first light guiding means by multiple total internal reflections at said first and second light reflecting means; and a plurality of means for redirecting ambient light received through said top surface of the first light guiding means at a first angle greater than 45 degrees with respect to the normal to said first light guiding means, said redirecting means refracting said ambient light at a second angle such that light is guided in the first light guiding means by total internal reflection from said first and second light reflecting means.
- FIG. 1A illustrates the side view of a prismatic light guide comprising a plurality of prismatic features to collect and guide light to a photo cell.
- FIG. 1B illustrates a perspective view of a prismatic light guide comprising a plurality of prismatic features to collect and guide light to a photovoltaic cell.
- FIG. 1C shows the perspective view of the embodiment described in FIG. 1A .
- FIG. 2 illustrates an embodiment comprising two layers of prismatic light guides stacked with offsetting prismatic features to collect and guide light in to a photovoltaic cell with greater efficiency.
- FIG. 3 illustrates the distribution of light rays incident on the light guide that are coupled into the guided modes.
- FIG. 4 illustrates the lobe along which incident radiation is coupled into guided modes for a prismatic film with wide angled facets.
- FIG. 5 illustrates the lobe along which incident radiation is coupled into guided modes for a prismatic film with narrow angled facets.
- FIG. 6 illustrates an embodiment with two layers of prismatic light guides comprising narrow and wide angled facets for maximizing collection angle.
- FIG. 7 illustrates an embodiment wherein the narrow and wide angled facets are comprised on the same prismatic light guide.
- FIG. 8A illustrates an embodiment comprising of prismatic features that are arranged concentrically with a photo cell placed at the center.
- FIG. 8B illustrates an embodiment comprising of curvilinear prismatic features and a photo cell placed at one edge.
- FIG. 9 illustrates a matrix of microstructure patterns.
- FIG. 10 illustrates an embodiment wherein the photocell is beveled with respect to the prismatic thin film
- FIG. 11 illustrates the side view of an embodiment comprising a collector lens, a prismatic film and a reflector disposed over an array of photocells.
- FIG. 12A illustrates the top view of a thin film comprising conical features bound by reflectors on two sides to direct light in to two photocells placed at the other two edges.
- FIG. 12B is a side view of the embodiment illustrated in FIG. 12A with conical facets.
- FIG. 13A illustrates the side view of an embodiment comprising two light collecting films and a photocell.
- FIG. 13B illustrates the side view of an embodiment comprising two light collecting films and two photocells.
- FIG. 13C illustrates the side view of an embodiment comprising one light collecting film and two photocells.
- FIG. 14 shows light collecting plate, sheet or film optically coupled to photo cells placed on the roof and on the windows of a residential dwelling.
- FIG. 15 shows an embodiment wherein light collecting plate, sheet or film optically coupled to photo cells is placed on the roof of an automobile.
- FIG. 16 illustrates a light collecting plate, sheet or film optically coupled to photo cells is attached to the body of a laptop.
- FIG. 17 shows an example of attaching light collecting plate, sheet or film optically coupled to photo cells is attached to an article of clothing.
- FIG. 18 shows an example of placing light collecting plate, sheet or film optically coupled to photo cells on shoes.
- FIG. 19 indicates an embodiment wherein light collecting plate, sheet or film optically coupled to photo cells is attached to the wings and windows of an airplane.
- FIG. 20 indicates an embodiment wherein light collecting plate, sheet or film optically coupled to photo cells is attached to a sail boat.
- FIG. 21 indicates an embodiment wherein light collecting sheet, plate or film optically coupled to photo cells is attached to a bicycle.
- FIG. 22 indicates an embodiment wherein light collecting plate, sheet or film optically coupled to photo cells is attached to a satellite.
- FIG. 23 shows an embodiment wherein light collect sheet that is substantially flexible to be rolled is optically coupled to photo cells.
- the embodiments may be implemented in any device that is configured to collect, trap and concentrate radiation for a source. More particularly, it is contemplated that the embodiments described herein may be implemented in or associated with a variety of applications such as providing power to residential and commercial properties, providing power to electronic devices such as laptops, PDAs, wrist watches, calculators, cell phones, camcorders, still and video cameras, mp3 players etc.
- the embodiments described herein can be used in wearable power generating clothing, shoes and accessories. Some of the embodiments described herein can be used to charge automobile batteries, navigational instruments and pumping water. The embodiments described herein can also find use in aerospace and satellite applications.
- a solar collector and/or concentrator is coupled to a photo cell.
- the solar collector and/or concentrator comprises a light guide; for example a plate, sheet or film; with prismatic turning features formed thereon. Ambient light that is incident on the light guide is turned into the light guide by the prismatic features and guided through the light guide by total internal reflection.
- a photo cell is disposed along one or more edges of the light guide and light that is emitted out of the light guide is coupled into the photo cell.
- the light guide may be formed as a plate, sheet or film.
- the light guide may be fabricated from a rigid or a semi-rigid material.
- the light guide may be formed of a flexible material.
- the light guide may comprise a thin film.
- the light guide may comprise grooves arranged in a linear fashion.
- the prismatic features may have non-linear extent.
- the prismatic features may be arranged along curves.
- An alternate embodiment may comprise of a thin film light guide with conical reflective features dispersed through the light guiding medium.
- FIG. 1A One embodiment of a prismatic light guide used to couple ambient light into a photo cell is shown in FIG. 1A .
- the photo cell may be a photovoltaic cell or a photo detector.
- the prismatic light guiding collector is based on the principle of reciprocity.
- FIG. 1A illustrates the side view of an embodiment comprising a light guide 104 disposed with respect to a photo cell 100 .
- the light guide 104 may further comprise a substrate 105 and a plurality of prismatic features 108 disposed thereon.
- the light guide 104 may comprise a top and bottom surface including a plurality of edges therebetween.
- the light guide 104 may comprise optically transmissive material that is transparent to radiation at one or more wavelengths that the photo cell is sensitive to.
- the light guide 104 may be transparent to wavelengths in the visible and near infra-red region.
- the light guide 104 may be transparent to wavelengths in the ultra-violet or infra-red regions.
- the light guide 104 may be formed from rigid or semi-rigid material such as glass or acrylic so as to provide structural stability to the embodiment.
- the light guide 104 may be formed of flexible material such as a flexible polymer.
- the light guide 104 comprises two surfaces.
- the upper surface is configured to receive ambient light.
- the bottom surface is disposed below the upper surface.
- the light guide 104 is bounded by an edge all around.
- the length and width of the light guide 104 is substantially greater than the thickness of the light guide 104 .
- the thickness of the light guide 104 may vary from 0.5 to 10 mm.
- the area of the light guide 104 may vary from 0.01 to 10000 cm 2 .
- the refractive index of the material comprising the light guide 104 may be significantly higher than the surrounding so as to guide a large portion of the ambient light within the light guide 104 by total internal reflection (TIR).
- the light guide comprises of prismatic features 108 disposed on the bottom surface of the substrate 105 .
- the prismatic features in general are elongated grooves formed on the bottom surface of the substrate 105 .
- the grooves may be filled with an optically transmissive material.
- the prismatic features 108 may be formed on the bottom surface of the substrate 105 by molding, embossing, etching or other alternate techniques. Alternatively the prismatic features 108 may be disposed on a film which may be laminated on the bottom surface of the substrate 105 .
- light may be guided within the prismatic film alone.
- the substrate 105 may provide structural stability alone.
- the prismatic features 108 may be comprise a variety of shapes.
- the prismatic features 108 may be linear v-grooves. Alternately, the prismatic features 108 may comprise curvilinear grooves or non-linear shapes.
- FIG. 1B shows an enlarged view of prismatic features 108 in the form of a linear v-groove 116 .
- the v-groove 116 comprises two planar facets F 1 and F 2 arranged with an angular separation ⁇ with respect to each other as shown in FIG. 1B .
- the angular separation ⁇ between the facets may vary from 15 degrees to 120 degrees.
- the facets F 1 and F 2 may be of equal lengths. Alternatively in other embodiments, the length of one of the facets may be greater than the other.
- the distance between two consecutive v-grooves ‘A’ may vary between 0.01 to 0.5 mm.
- the width of the v-groove indicated by ‘b’ may vary between 0.001 to 0.100 mm while the depth of the v-groove indicated by ‘D’ may vary between 0.001 to 0.5 mm.
- FIG. 1C shows the perspective view of the embodiment described in FIG. 1A .
- the embodiment described in FIG. 1C comprises of rows of linear v-grooves arranged along the bottom surface of the substrate 105 .
- a photo cell 100 is disposed laterally with respect to the light guide 104 .
- the photo cell is configured to receive light guided through the light guide 104 by the prismatic features 108 .
- the photo cell 100 may comprise a single or a multiple layer p-n junction and may be formed of silicon, amorphous silicon or other semiconductor materials such as Cadmium telluride.
- photo cell 100 based on photoelectrochemical cells, polymer or nanotechnology may be used.
- Photo cell 100 may also comprise thin multispectrum layers.
- the multispectrum layers may further comprise nanocrystals dispersed in polymers. Several multispectrum layers may be stacked to increase efficiency of the photo cell 100 .
- FIG. 1A and 1B show an embodiment wherein the photo cell 100 is disposed along one edge of the light guide 104 (for example, to the left of the light guide 104 ). However, another photo cell may be disposed at the other edge of the light guide 104 as well (for example, to the right of the light guide 104 ). Other configurations of positioning the photo cell with respect to the light guide 104 are also possible.
- Ambient light that is incident on the upper surface of the light guide 104 is transmitted through the light guide 104 as indicated by the light path 112 .
- the light Upon striking a facet of the prismatic feature 108 , the light is total internally reflected by multiple reflections from the upper and bottom surface of the light guide 104 .
- the ray of light exits the light guide 104 and is optically coupled to the photo cell 100 .
- Lenses or light pipes may be used to optically couple light from the light guide 104 to the photo cell 100 .
- the light guide 104 may be devoid of prismatic features 108 towards the end closer to the photo cell 100 .
- the portion of the light guide 104 without any prismatic features may function as a light pipe.
- the amount of light that can be collected and guided through the light guide will depend on the geometry, type and density of the prismatic features.
- the amount of light collected will also depend upon the refractive index of the light guiding material, which determines the numerical aperture.
- Light is guided through the light guide 104 by TIR.
- the guided light may suffer losses due to absorption in the light guide and scattering from other facets.
- limiting the length of the light guide 104 may reduce the area over which light is collected.
- the length of the light guide 104 may be increased to greater than tens of inches.
- optical coatings may be deposited on the surface of the light guide 104 to reduce Fresnel loss.
- FIG. 2 illustrates an exemplary embodiment 2 comprising a first light guiding layer 204 with prismatic features 208 and a second light guiding layer 212 with prismatic features 216 .
- a photo cell 200 is disposed laterally with respect to the two light guiding layers 204 and 212 .
- the prismatic features 208 and 216 are offset with respect to each other.
- Light ray 220 is turned and guided through the light guide 204 as described above.
- Light ray 224 which passes through the light guide 204 from point A is turned and guided through the light guide 212 .
- Offsetting the prismatic features 208 and 216 in this manner reduces the spaces between the features and increases the density of the prismatic features. Offsetting the features may increase the amount of light optically coupled to the photo cell thereby increasing the electrical output of the photo cell. Since the light guide layers 204 and 212 can be thin, it is possible to stack multiple light guide layers and increase the amount of light coupled to the PV cell. The number of layers that can be stacked together depends on the size and/or thickness of each layer and the Fresnel loss at the interface of each layer. In some embodiments, at least ten light guide layers may be stacked together.
- An advantage of using a prismatic light guiding plate, sheet or film to collect, concentrate and direct light towards a photo cell is that lesser number of photo cells maybe needed to achieve the desired electrical output. Thus this technique may possibly reduce the cost of generating energy with photo cells.
- FIG. 3 shows a distribution of light rays incident on the light guide that are coupled into the light guide by the prismatic features.
- the distribution of the incident light includes two lobes 312 and 316 .
- Incident lobe 312 is close to the normal to the surface of the light guide.
- the incident lobe 312 can span from near normal incidence to the light guide 104 to approximately 45 degrees from the normal to the light guide 104 .
- Incident lobe 316 is oriented substantially parallel to the surface of the light guide.
- the angular spread of the incident lobe can range from approximately 45 degrees with respect to the surface of the light guide 104 to approximately grazing angles to the surface of the light guide 104 .
- FIG. 4 illustrates an embodiment comprising a light guide 404 .
- Prismatic features 408 are disposed on the bottom surface of the light guide 404 .
- Light incident on the upper surface of the light guide 404 is turned into the light guide 404 by the prismatic feature 408 and guided through the light guide 404 by TIR.
- the angular separation ⁇ between the facets comprising the prismatic feature 408 is large for example, greater than 90 degrees thereby resulting in wide prismatic features.
- the wide prismatic features can turn light incident at substantially grazing angles of incidence, for example, at approximately 5 degrees-45 degrees from the surface of the light guide 404 .
- the angular separation ⁇ between the facets of the prismatic features 508 is small for example, less than 90 degrees, thereby resulting in narrow angled facets.
- the wide prismatic features can turn light incident at angles substantially close to the normal to the surface, for example, at approximately 5 degrees-45 degrees from the normal to the surface of the light guide 504 .
- FIG. 6 shows an embodiment comprising of two light guides 604 and 608 disposed laterally with respect to an edge of a photo cell 600 .
- Light guide 604 further comprises of relatively narrow prismatic features 612 and light guide 608 further comprises of relatively wide angled facets 616 .
- Ray of light 620 close to the normal for example, at 5 degrees-45 degrees from the normal to the surface of the two light guides 604 and 608 is efficiently collected and guided through light guide 604 with relatively narrow angled facets whereas the ray of light 624 incident at grazing angle for example, at approximately 5 degrees-45 degrees to the surface of the two light guides 604 and 608 is efficiently collected and guided through the light guide 608 with relatively wider facets.
- One advantage of this design is that light can be collected at a wide range of angles efficiently without mechanically rotating the film.
- the dependence of the performance of the photo cell on the time of day and month of the year can be significantly reduced.
- light from the sun may be incident on the light guide at grazing angles in morning and evening while the light from the sun may be incident on the light guide close to the normal around noon.
- the embodiment described above comprising multiple light guide layers with relatively narrow and wide angled facets will be able to collect light with approximately equal efficiency in the morning, afternoon and evening.
- FIG. 7 illustrates an alternate embodiment comprising both narrow and wide angled facets on the same light guide.
- FIG. 8 illustrates an embodiment using a multi angle approach.
- the elongated facets of the prismatic features or v grooves have non linear extent.
- the particular embodiment illustrated in embodiment comprises of a light guiding plate, sheet or film 800 formed from an optically transmissive material. Grooves are arranged along concentric circles 804 on the surface of the light guiding plate 800 . In some embodiments, the grooves may be disposed along elliptical paths. These grooves may be v shaped grooves as indicated by the cross-section 812 . V grooves that are concentric can be fabricated using a similar fabrication process as linear v grooves. Such a light guide will accept light at a wide range of angles ⁇ azimuthal to the plane of the light guide 800 .
- the v grooves turn the light. Light then propagates to the center of the concentric pattern as indicated by light ray 808 and is incident on a photo cell 816 placed at the center of the concentric pattern.
- the embodiment described in FIG. 8 may be advantageous to collect diffused ambient light for example, in cloudy conditions.
- a photo cell 820 may be positioned at one corner of a light guiding plate, sheet or film 824 .
- the light guiding plate, sheet or film may have rectangular, square or some other geometry.
- Grooves maybe formed on the light guiding plate, sheet or film along curves 828 .
- the centers of the curves 824 are not at the center of the light guiding plate, sheet or film 824 .
- the centers of the curves 828 are closer to the corner with the photo cell 820 than the other corner.
- the grooves are concave and they face the photo cell 820 .
- the light guiding plate, sheet or film 824 comprising curved grooves 828 can collect light and turn it towards the concave side and direct the light to the photo cell 820 .
- Such a design comprising curvilinear prismatic features or grooves may be more efficient in light collecting than the design comprising photo cells disposed along one edge of a linear prismatic film.
- the length of the light guide may be limited to tens of inches to reduce loss due to reflections. However, limiting the length of the light guide may reduce the area over which light is collected. In some applications it may be advantageous to collect light over a large area. In such cases, one approach can be a matrix pattern of micro-structure shown in FIG. 9 may be beneficial.
- the embodiment shown in FIG. 9 illustrates a plurality of elements 900 arranged in a matrix pattern.
- the matrix pattern may comprise of a plurality of rows and columns. The number of rows can be equal to the number of columns. The number of elements in any two rows may be different. Similarly, the number of elements in any two columns may be different as well. In some embodiments, the matrix pattern may be irregular.
- Elements in the matrix comprise a light guiding plate, sheet or film with a plurality of v groove patterns 904 formed thereon. Other groove patterns besides v grooves can be used as well. Elements in the matrix may contain the same or different microstructure pattern. For example, the microstructure pattern in the different elements may vary in size, shape and type. Thus different elements in the matrix may collect sunlight at different angles. Photo cells 908 may be distributed within the periphery of the matrix as well as along the periphery of the matrix. The method disclosed above may be advantageous in fabricating large panels of light collectors coupled to photo cells for example, that can be fixed to roof tops of residential and commercial buildings.
- FIG. 10 illustrates an embodiment with a beveled light guiding plate, sheet or film 1004 comprising prismatic features 1008 .
- the side view of the embodiment shown in FIG. 10 indicates a light guide with an upper surface S 1 and a lower surface S 2 .
- the upper and lower surfaces S 1 and S 2 are bound on the left by an edge surface E 1 and on the right by an edge surface E 2 .
- the edge surfaces E 1 and E 2 are inclined with respect to the upper and lower surfaces S 1 and S 2 .
- the angle of inclination of the edge surfaces E 1 and E 2 with respect to upper and lower surfaces S 1 and S 2 is not equal to 90°.
- a ray of light 1012 is guided along the beveled light guide by total internal reflection and incident on a photo cell 1000 disposed rearward of the light guiding plate or film 1004 . Beveling the edge of the light guiding plate, sheet or film 1004 may simplify the alignment between the photo cell 1000 and the light guiding plate, sheet or film 1004 .
- a ray of light 1012 incident on the upper surface of the light guiding plate, sheet or film 1004 is turned into the light guide 1004 by the prismatic feature 1008 and guided within the light guide 1004 by total internal reflection from the upper and lower surfaces S 1 and S 2 .
- the guided light ray 1012 is directed out of the light guide close to the normal to the lower surface S 2 towards a photo cell 1000 disposed rearward of the light guide 1004 .
- FIG. 11 illustrates an embodiment comprising a light guiding plate, sheet or film 1100 .
- the light guide comprises four surfaces S 1 , S 2 , S 3 and S 4 .
- Light is collected through a collection lens 1104 and incident on one surface S 1 of the light guide 1100 .
- Prismatic features 1103 disposed are disposed on an adjacent surface S 2 of the light guide 1100 .
- the light entering the light guiding plate, sheet or film 1100 is turned by prismatic features 1103 and guided by total internal reflection through the light guiding plate, sheet or film 1100 .
- a ray of light indicated by 1112 is guided within the light guide 1100 by total internal reflection from the two surfaces S 2 and S 3 adjacent to the input surface S 1 until it strikes one of the facets of the prismatic feature 1103 .
- the ray of light 1112 Upon striking the facet, the ray of light 1112 is directed out of the light guide 1100 towards the photo cell 1108 disposed away from the surface comprising the prismatic features 1103 as indicated in FIG. 11 .
- a ray of light indicated by 1116 which does not strike the prismatic feature and is thus not directed out of the light guiding plate, sheet or film 1100 is coupled back into the light guiding plate, sheet or film 1100 by a reflector 1120 at the other end away from the collection lens 1104 .
- FIG. 12A indicates the top view of a thin film solar concentrator 1200 .
- the thin film solar concentrator 1200 is formed of an optically transmissive material and comprises two surfaces.
- the thin film solar concentrator has conical cavities 1204 formed on the surface of the thin film solar concentrator away from the surface through which light is incident instead of elongate grooves.
- FIG. 12B indicates the side view of the thin film solar concentrator with the conical cavities. Referring again to FIG. 12A , the conical cavities 1204 are distributed throughout the light guiding thin film in a random or ordered manner.
- the thin film solar concentrator 1200 further comprises photo cells 1208 that are placed along two edges of the thin film solar concentrator 1200 .
- reflectors 1212 are placed along the remaining edges of the thin film solar concentrator 1200 to increase light trapping efficiency.
- the reflectors 1212 may be replaced with photo cells 1208 .
- the conical cavities indicated in FIG. 12B have a circular cross section. However, conical cavities with elliptical cross section may be formed as well. Light incident on the surface of the thin film solar concentrator 1200 is total internally reflected by the conical cavities 1204 and directed toward the photo cells 1208 .
- the conical cavities are three dimensional structures and can thus accept light from a plurality of directions and reflect it along a plurality of directions.
- the embodiment described in FIG. 12A and FIG. 12B can collect light in a full solid angle and thus has greater light collecting capability.
- two light guiding layers with prismatic features may be stacked to collect ambient and reflected light as shown in FIGS. 13A-13C .
- the embodiment illustrated in FIG. 13A comprises a top light guiding layer 1305 and a bottom light guiding layer 1307 .
- the light guiding layers 1305 and 1307 comprise a top surface SI and a bottom surface S 2 .
- the top light guiding layer 1305 further comprises prismatic features disposed on the bottom surface S 2 .
- the bottom light guiding layer 1307 comprises prismatic features disposed on the top surface Si.
- the prismatic features on the two light guiding layers may be offset with respect to each other.
- the prismatic features may not be offset with respect to each other.
- the offset distance between the prismatic features in the top light guiding layer 1305 and the bottom light guiding layer 1307 are configured to reduce or avoid visual artifacts.
- the two light guiding layers 1305 and 1307 may be joined together by adhesive.
- the two light guiding layers 1305 and 1307 may be laminated together.
- the two light guiding layers may comprise a gap there between.
- the two light guiding layers 1305 and 1307 may be disposed on a substrate 1301 .
- the substrate 1301 may be selected from a group consisting of a transparent substrate and may be a partially reflecting surface, a display device, a display device comprising an interferometric modulator (IMOD) or other suitable material.
- the substrate 1301 may comprise a smart glass or switchable glass.
- Smart glass or switchable glass is a glass or glazing that can change its degree of transparency in response to an applied voltage.
- Smart glass or switchable glass can comprise electro-chromic devices, suspended particle devices or polymer dispersed liquid crystal devices. In electro-chromic devices, the smart glass is formed of an electro-chromic material.
- a layer of electro-chromic material may be disposed on the outer or inner surface of a transparent medium.
- the electro-chromic material can change its transparency between opaque, translucent and transparent in response to an electric voltage or current. Once a change has been effected, the electro-chromic material will maintain its degree of transparency even after the electrical voltage or current is removed.
- a thin layer of particles in the form of a laminate, film or sheet may be disposed between two layers of transparent material such as glass or plastic. When no electrical voltage is applied, the particles may be arranged in a random fashion and may absorb or obstruct passage of light. However in response to an applied voltage, the particles may be aligned and may allow light to pass through them.
- a layer of liquid crystal material may be disposed between two transparent layers comprising glass or plastic. Similar to the suspended particle devices, when no electrical voltage is applied the liquid crystals may be oriented in a random fashion and thus obstruct light. In response to an electrical voltage, the liquid crystals may be oriented along a direction and allow light to pass through them.
- the two light guiding layers 1305 and 1307 may be affixed to the substrate 1301 by adhesive. In some embodiments, the two light guiding layers 1305 and 1307 may be laminated to the substrate 1301 . This substrate 1301 may be diffusive in some embodiments. For example the substrate 1301 may have a diffusely reflective surface in certain embodiments.
- a photocell 1303 is disposed to one side (e.g., either to the left or to the right as shown in FIG. 13A or elsewhere) of the two light guiding layers 1305 and 1307 .
- the photocell is disposed to the left of the light guiding layers 1305 and 1307 .
- An incident beam of light 1313 that strikes a facet on the bottom surface S 2 of the top light guiding layer 1305 is deflected by the facet and guided through the top light guiding layer 1305 toward the photocell 1303 .
- the top light guiding layer 1305 can be used to capture a portion of the incident light. Some of the incident light may not strike a facet of the top light guiding layer 1305 .
- Some of the incident light that does not strike a facet of the top light guiding layer 1305 may pass through the bottom light guiding layer 1307 and the substrate 1301 as indicated by ray 1311 . Some of the incident light that does not strike a facet of the top light guiding layer 1305 (for e.g., ray 1313 ) may be reflected from the interface of the bottom light guiding layer 1307 and the substrate 1301 out of the top light guiding layer 1305 as indicated by the ray 1315 . However some of the reflected light may strike a facet on the top surface of the bottom light guiding layer 1307 as indicated by ray 1317 and be guided through the bottom light guiding layer towards the photocell 1303 .
- the substrate 1301 may be diffusive, e.g., have a diffusely reflective surface.
- a diffusing layer may be disposed on the substrate.
- Other designs can be used.
- the bottom light guiding layer 1307 may capture light that is not collected by the top light guiding layer 1305 and is reflected from the substrate 1301 .
- Other configurations are also possible.
- the light collection ability of the light guiding layer can vary linearly with the density of the features.
- the density of the prismatic features can be increased.
- the surface area of the prismatic features can be approximately 5%-10% of the total surface area of the light guiding layer.
- the density of features can be greater than 10% of the overall surface area of the film. Other configurations are possible.
- the PV cells can be disposed to both sides of the light guiding layers 1305 and 1307 as shown in FIG. 13B .
- incident light 1309 is collected by the top light guiding layer 1305 and directed towards photocell 1303 b disposed to the right of the light guiding layers.
- the bottom light guiding layer 1307 collects light reflected from the substrate 1301 and directed this collected light towards photocell 1303 a disposed to the left of the light guiding layers.
- the substrate 1301 may be diffusive, e.g., have a diffusely reflective surface.
- a diffusing layer may be disposed on the substrate. Still other configurations are also possible.
- the top light guiding layer 1305 may be excluded as illustrated in FIG. 13C .
- two photocells 1303 a and 1303 b are disposed to the left and right respectively of the light guiding layer 1307 .
- Incident beam of light 1309 strikes a facet of the prismatic feature disposed on the top surface S 1 of the light guiding layer 1307 is refracted by the prismatic feature and is guided through the light guiding layer 1307 towards photocell 1303 b.
- a beam of light 1313 that does not strike a facet enters the light guiding layer 1307 and is reflected by the substrate 1301 .
- the substrate 1301 may be diffusive, e.g., having a diffusely reflecting surface.
- a diffusing layer may be disposed on the substrate.
- the reflected ray 1317 strikes a facet of the prismatic feature disposed on the top surface S 1 of the light guiding layer 1307 and is guided through the light guiding layer towards photocell 1303 a. In this manner a single light guiding layer can be used to collect both incident and reflected light.
- a wide variety of other configurations are also possible.
- the method of using a light collecting plate, sheet or film comprising prismatic features to collect, concentrate and direct light to a photo cell can be used to realize solar cells that have increased efficiency and can be inexpensive, thin and lightweight.
- the solar cells comprising a light collecting plate, sheet or film coupled to a photo cell may be arranged to form panels of solar cells. Such panels of solar cells can be used in a variety of applications.
- a panel of solar cell 1404 comprising a plurality of light collecting light guides optically coupled to photo cells may be mounted on the roof top of a residential dwelling or a commercial building or placed on doors and windows as illustrated in FIG. 14 to provide supplemental electrical power to the home or business.
- the light collecting plate, sheet or film may be formed of a transparent or semi-transparent plate, sheet or film.
- the prismatic light collecting plate, sheet or film may be colorized (for example red or brown) for aesthetic purposes.
- the light collecting plate, sheet or film may be rigid or flexible.
- the light collecting plate, sheet or film may be sufficiently flexible to be rolled.
- Solar cell panels comprising of such sheets 1408 may be attached to window panes as shown in FIG. 14 .
- the light collecting sheets may be transparent to see through the window. Alternatively they might be colorized to block light.
- the prismatic sheets may have wavelength filtering properties to filter out the ultra-violet radiation.
- light collecting plate, sheet or film may be mounted on cars and laptops as shown in FIGS. 15 and 16 respectively to provide electrical power.
- the light collecting plate, sheet or film 1504 is mounted to the roof of an automobile.
- Photo cells 1508 can be disposed along the edges of the light collector 1504 .
- the electrical power generated by the photo cells can be used for example, to recharge the battery of a vehicle powered by gas, electricity or both or run electrical components as well.
- the light collecting plate, sheet or film 1604 may be attached to the body (for example external casing) of a laptop. This is advantageous in providing electrical power to the laptop in the absence of electrical connection.
- the light guiding collector optically coupled to photo cells may be used to recharge the laptop battery.
- the light collecting plate, sheet or film optically coupled to photo cells may be attached to articles of clothing or shoes.
- FIG. 17 illustrates a jacket or vest comprising the light collecting plate, sheet or film 1704 optically coupled to photo cells 1708 disposed around the lower periphery of the jacket or vest.
- the photo cells 1708 may be disposed anywhere on the jacket or vest.
- the light collecting plate, sheet or film 1704 may collect, concentrate and direct ambient light to the photo cells 1708 .
- the electricity generated by the photo cells 1708 may be used to power handheld devices such as PDAs, mp3 players, cell phone etc.
- the electricity generated by the photo cells 1708 may be used to light the vests and jackets worn by airline ground crew, police, fire fighters and emergency workers in the dark to increase visibility.
- the light collecting plate, sheet or film 1804 may be disposed on a shoe. Photo cells 1808 may be disposed along the edges of the light collecting plate, sheet or film 1804 .
- Panels of solar cells comprising of prismatic light collecting plate, sheet or film coupled to photo cells may be mounted on planes, trucks, trains, bicycles, sail boats and satellites as well.
- light collecting plate, sheet or film 1904 may be attached to the wings of an airplane or window panes of the airplane.
- Photo cells 1908 may be disposed along the edges of the light collecting plate, sheet or film as illustrated in FIG. 19 .
- the electricity generated may be used to provide power to parts of the aircraft.
- FIG. 20 illustrates the use of light collectors coupled to photo cells to power navigation instruments or devices in a boat for example, refrigerator, television and other electrical equipments.
- the light collecting plate, sheet or film 2004 is attached to the sail of a sail boat or alternately to the body of the boat.
- PV cells 2008 are disposed at the edges of the light collecting plate, sheet or film 2004 .
- the light collecting plate, sheet or film 2004 may be attached to the body of the sail boat for example, the cabin hole or deck.
- Light collecting plate, sheet or film 2104 may be mounted on bicycles as indicated in FIG. 21 .
- FIG. 22 illustrates yet another application of the light collecting plate, sheet or film optically coupled to photo cells to provide power to communication, weather and other types of satellites.
- FIG. 23 illustrates a light collecting sheet 2304 that is sufficiently flexible to be rolled.
- the light collecting sheet is optically coupled to photo cells.
- the embodiment described in FIG. 23 may be rolled and carried on camping or backpacking trips to generate electrical power outdoors and in remote locations where electrical connection is sparse. Additionally, the light collecting plate, sheet or film that is optically coupled to photo cells may be attached to a wide variety of structures and products to provide electricity.
- the light collecting plate, sheet or film optically coupled to photo cells may have an added advantage of being modular.
- the photo cells may be configured to be selectively attachable to and detachable from the light collecting plate, sheet or film.
- existing photo cells can be replaced periodically with newer and more efficient photo cells without having to replace the entire system. This ability to replace photo cells may reduce the cost of maintenance and upgrades substantially.
- Films, layers, components, and/or elements may be added, removed, or rearranged. Additionally, processing steps may be added, removed, or reordered. Also, although the terms film and layer have been used herein, such terms as used herein include film stacks and multilayers. Such film stacks and multilayers may be adhered to other structures using adhesive or may be formed on other structures using deposition or in other manners.
Abstract
Description
- 1. Field of the Invention
- The present invention relates to the field of light collectors and concentrators and more particularly to using micro-structured thin films to collect and concentrate solar radiation.
- 2. Description of the Related Art
- Solar energy is a renewable source of energy that can be converted into other forms of energy such as heat and electricity. Major drawbacks in using solar energy as a reliable source of renewable energy are low efficiency in converting light energy to heat or electricity and the variation in the solar energy depending on the time of the day and the month of the year.
- A Photovoltaic (PV) cell based on the principle of converting light energy to electrical energy can be used to convert solar energy to electrical energy. Systems using PV cells can have conversion efficiencies between 10-20%. PV cells can be made very thin and are not big and bulky as other devices that use solar energy. PV cells can range in size from a few millimeters to 10's of centimeters. The individual electrical output from one PV cell may range from a few milliWatts to a few Watts. Several PV cells may be connected electrically and packaged to produce a sufficient amount of electricity.
- Solar concentrators can be used to collect and focus solar energy to achieve higher conversion efficiency in PV cells. For example, parabolic mirrors can be used to collect and focus light on a device that converts light energy in to heat and electricity. Other types of lenses and mirrors can also be used to significantly increase the conversion efficiency but they do not overcome the variation in amount of solar energy received depending on time of the day, month of the year or weather conditions. Further the systems employing lenses/mirrors tend to be bulky and heavy because the lenses and mirrors that are required to efficiently collect and focus sunlight have to be large.
- PV cells can be used in wide range of applications such as providing power to satellites and space shuttles, providing electricity to residential and commercial properties, charging automobile batteries and other navigation instruments. The performance of the PV cell depends on sunlight thus the conversion efficiency of PV cells, similar to other devices using solar energy depends on the time of day, month of the year and daily weather conditions. To overcome these drawbacks it is advantageous to employ light collectors and concentrators that collect and focus light on the PV cell and track the movement of the sun through the day. Additionally it is also advantageous to have the ability to collect diffused light on cloudy days. Such systems are complicated, often bulky and large. For many applications it is also desirable that these light collectors and/or concentrators are compact in size.
- Various embodiments described herein comprise light guides for collecting/concentrating ambient light and directing the collected light to a photocell. The light guide may include surface relief features to redirect incident light and propagate it through the light guide by multiple total internal reflections. The surface relief features may comprise facets that reflect light. In some embodiments, the facets may be angled with respect to each other. The photocell is optically coupled to the light guide. In some embodiments the photocell may be disposed adjacent to the light guide. In some other embodiments, the photocell may be disposed at one corner of the light guide. In yet other embodiments, the photocell may be disposed below the light guide. In some embodiments, the light guide may be disposed on a substrate. The substrate may comprise glass, plastic, electrochromic glass, smart glass, etc.
- In one embodiment, a device for collecting solar energy is disclosed. The device comprises a first light guide having top and bottom surfaces, said light guide guiding light therein by multiple total internal reflections at said top and bottom surfaces. The device further comprises a photocell optically coupled to the first light guide. In some embodiments, a plurality of prismatic features is disposed on the first light guide to redirect ambient light received through said top surface such that said light is guided in the light guide by total internal reflection from said top and bottom surfaces to said photocell. In one embodiment, the prismatic features may comprise elongate grooves. In some embodiments, the elongate grooves may be straight. In other embodiments, the elongate grooves may be curved. In one embodiment of the device, the prismatic features may comprise pits. In one embodiment, the pits may be conical.
- In one embodiment, the device may comprise a first light guide further comprising a prismatic film disposed over a substrate and said film including said plurality of prismatic features therein. In some embodiments, said prismatic features may be at said bottom surface of said first light guide. In some other embodiments, the prismatic features may extend along a plurality of parallel linear paths. In other embodiments, the prismatic features may extend along plurality of. concentric circular curved paths. In yet other embodiments, the prismatic features extend along a plurality of elliptical curved paths.
- In one embodiment of the device, the first light guide comprises a first layer comprising said first set of prismatic features; and a second layer comprising a second set of prismatic features. In some embodiments, at least some of the prismatic features in the first layer are laterally offset with respect to some of the prismatic features in the second layer. In another embodiment, at least some of the prismatic features in the first layer are shaped differently than some of the prismatic features in the second layer. In another embodiment of the device, a second light guide having top and bottom surfaces and including a plurality of edges between said top and bottom surfaces is disposed below the first light guide. The second light guide comprises a plurality of prismatic features to redirect light received through said bottom surface such that light is guided in the second light guide by total internal reflection from said top and bottom surfaces. The light that is guided in the second light guide is directed towards a photocell.
- In one embodiment of the invention, a device for collecting solar energy is disclosed. The device comprises a first means for guiding light, said first means having first and second means for reflecting light, such that light is guided within said means for guiding light by multiple total internal reflections at said first and second light reflecting means. The device further comprises a means for converting light energy into alternate forms of energy; and a means for redirecting ambient light received through said first and second light reflecting means such that said light is guided in the means for guiding light by total internal reflection from said first and second light reflecting means to said means for converting light energy into electrical energy. In one embodiment, the first and second light reflecting means may comprise the top and bottom surface of the light guiding means. A plurality of edges may be disposed between the top and bottom surface of the light guiding means.
- In one embodiment of the invention, a method of manufacturing a device for collecting solar energy is disclosed. The method comprises providing a first light guide, said first light guide having top and bottom surfaces. The method further comprises providing a photocell such that the first light guide is optically coupled to the photocell; and forming a plurality of prismatic features on one of the top or bottom surfaces of said first light guide.
- In one embodiment, a device for collecting ambient light is disclosed. The device comprises a first means for guiding light; said first means having first and second means for reflecting light such that light is guided within said first light guiding means by multiple total internal reflections at said first and second light reflecting means; and a plurality of means for redirecting ambient light received through said top surface of the first light guiding means at a first angle greater than 45 degrees with respect to the normal to said first light guiding means, said redirecting means refracting said ambient light at a second angle such that light is guided in the first light guiding means by total internal reflection from said first and second light reflecting means.
- Example embodiments disclosed herein are illustrated in the accompanying schematic drawings, which are for illustrative purposes only.
-
FIG. 1A illustrates the side view of a prismatic light guide comprising a plurality of prismatic features to collect and guide light to a photo cell. -
FIG. 1B illustrates a perspective view of a prismatic light guide comprising a plurality of prismatic features to collect and guide light to a photovoltaic cell. -
FIG. 1C shows the perspective view of the embodiment described inFIG. 1A . -
FIG. 2 illustrates an embodiment comprising two layers of prismatic light guides stacked with offsetting prismatic features to collect and guide light in to a photovoltaic cell with greater efficiency. -
FIG. 3 illustrates the distribution of light rays incident on the light guide that are coupled into the guided modes. -
FIG. 4 illustrates the lobe along which incident radiation is coupled into guided modes for a prismatic film with wide angled facets. -
FIG. 5 illustrates the lobe along which incident radiation is coupled into guided modes for a prismatic film with narrow angled facets. -
FIG. 6 illustrates an embodiment with two layers of prismatic light guides comprising narrow and wide angled facets for maximizing collection angle. -
FIG. 7 illustrates an embodiment wherein the narrow and wide angled facets are comprised on the same prismatic light guide. -
FIG. 8A illustrates an embodiment comprising of prismatic features that are arranged concentrically with a photo cell placed at the center. -
FIG. 8B illustrates an embodiment comprising of curvilinear prismatic features and a photo cell placed at one edge. -
FIG. 9 illustrates a matrix of microstructure patterns. -
FIG. 10 illustrates an embodiment wherein the photocell is beveled with respect to the prismatic thin film -
FIG. 11 illustrates the side view of an embodiment comprising a collector lens, a prismatic film and a reflector disposed over an array of photocells. -
FIG. 12A illustrates the top view of a thin film comprising conical features bound by reflectors on two sides to direct light in to two photocells placed at the other two edges. -
FIG. 12B is a side view of the embodiment illustrated inFIG. 12A with conical facets. -
FIG. 13A illustrates the side view of an embodiment comprising two light collecting films and a photocell. -
FIG. 13B illustrates the side view of an embodiment comprising two light collecting films and two photocells. -
FIG. 13C illustrates the side view of an embodiment comprising one light collecting film and two photocells. -
FIG. 14 shows light collecting plate, sheet or film optically coupled to photo cells placed on the roof and on the windows of a residential dwelling. -
FIG. 15 shows an embodiment wherein light collecting plate, sheet or film optically coupled to photo cells is placed on the roof of an automobile. -
FIG. 16 illustrates a light collecting plate, sheet or film optically coupled to photo cells is attached to the body of a laptop. -
FIG. 17 shows an example of attaching light collecting plate, sheet or film optically coupled to photo cells is attached to an article of clothing. -
FIG. 18 shows an example of placing light collecting plate, sheet or film optically coupled to photo cells on shoes. -
FIG. 19 indicates an embodiment wherein light collecting plate, sheet or film optically coupled to photo cells is attached to the wings and windows of an airplane. -
FIG. 20 indicates an embodiment wherein light collecting plate, sheet or film optically coupled to photo cells is attached to a sail boat. -
FIG. 21 indicates an embodiment wherein light collecting sheet, plate or film optically coupled to photo cells is attached to a bicycle. -
FIG. 22 indicates an embodiment wherein light collecting plate, sheet or film optically coupled to photo cells is attached to a satellite. -
FIG. 23 shows an embodiment wherein light collect sheet that is substantially flexible to be rolled is optically coupled to photo cells. - The following detailed description is directed to certain specific embodiments of the invention. However, the invention can be embodied in a multitude of different ways. As will be apparent from the following description, the embodiments may be implemented in any device that is configured to collect, trap and concentrate radiation for a source. More particularly, it is contemplated that the embodiments described herein may be implemented in or associated with a variety of applications such as providing power to residential and commercial properties, providing power to electronic devices such as laptops, PDAs, wrist watches, calculators, cell phones, camcorders, still and video cameras, mp3 players etc. In addition the embodiments described herein can be used in wearable power generating clothing, shoes and accessories. Some of the embodiments described herein can be used to charge automobile batteries, navigational instruments and pumping water. The embodiments described herein can also find use in aerospace and satellite applications.
- In various embodiments described herein, a solar collector and/or concentrator is coupled to a photo cell. The solar collector and/or concentrator comprises a light guide; for example a plate, sheet or film; with prismatic turning features formed thereon. Ambient light that is incident on the light guide is turned into the light guide by the prismatic features and guided through the light guide by total internal reflection. A photo cell is disposed along one or more edges of the light guide and light that is emitted out of the light guide is coupled into the photo cell. Using the light guide to collect, concentrate and direct ambient light to photo cells may realize opto-electric devices that convert light energy into heat and electricity with increased efficiency and lower cost. The light guide may be formed as a plate, sheet or film. The light guide may be fabricated from a rigid or a semi-rigid material. In some embodiments, the light guide may be formed of a flexible material. In yet other embodiments, the light guide may comprise a thin film. The light guide may comprise grooves arranged in a linear fashion. In alternate embodiments, the prismatic features may have non-linear extent. For example, in some embodiments the prismatic features may be arranged along curves. An alternate embodiment may comprise of a thin film light guide with conical reflective features dispersed through the light guiding medium.
- One embodiment of a prismatic light guide used to couple ambient light into a photo cell is shown in
FIG. 1A . The photo cell may be a photovoltaic cell or a photo detector. The prismatic light guiding collector is based on the principle of reciprocity.FIG. 1A illustrates the side view of an embodiment comprising alight guide 104 disposed with respect to aphoto cell 100. In some embodiment, thelight guide 104 may further comprise asubstrate 105 and a plurality ofprismatic features 108 disposed thereon. Thelight guide 104 may comprise a top and bottom surface including a plurality of edges therebetween. Light incident on the light guide may be redirected into the light guide by the plurality of prismatic features and guided within the light guide by multiple total internal reflections at the top and bottom surface. Thelight guide 104 may comprise optically transmissive material that is transparent to radiation at one or more wavelengths that the photo cell is sensitive to. For example in one embodiment, thelight guide 104 may be transparent to wavelengths in the visible and near infra-red region. In other embodiments, thelight guide 104 may be transparent to wavelengths in the ultra-violet or infra-red regions. Thelight guide 104 may be formed from rigid or semi-rigid material such as glass or acrylic so as to provide structural stability to the embodiment. Alternatively thelight guide 104 may be formed of flexible material such as a flexible polymer. - The
light guide 104 comprises two surfaces. The upper surface is configured to receive ambient light. The bottom surface is disposed below the upper surface. Thelight guide 104 is bounded by an edge all around. Typically, the length and width of thelight guide 104 is substantially greater than the thickness of thelight guide 104. The thickness of thelight guide 104 may vary from 0.5 to 10 mm. The area of thelight guide 104 may vary from 0.01 to 10000 cm2. In some embodiments, the refractive index of the material comprising thelight guide 104 may be significantly higher than the surrounding so as to guide a large portion of the ambient light within thelight guide 104 by total internal reflection (TIR). - In one embodiment, as shown in
FIG. 1A , the light guide comprises ofprismatic features 108 disposed on the bottom surface of thesubstrate 105. The prismatic features in general are elongated grooves formed on the bottom surface of thesubstrate 105. The grooves may be filled with an optically transmissive material. The prismatic features 108 may be formed on the bottom surface of thesubstrate 105 by molding, embossing, etching or other alternate techniques. Alternatively theprismatic features 108 may be disposed on a film which may be laminated on the bottom surface of thesubstrate 105. In some embodiments comprising a prismatic film, light may be guided within the prismatic film alone. In such embodiments, thesubstrate 105 may provide structural stability alone. The prismatic features 108 may be comprise a variety of shapes. For example, theprismatic features 108 may be linear v-grooves. Alternately, theprismatic features 108 may comprise curvilinear grooves or non-linear shapes. -
FIG. 1B shows an enlarged view ofprismatic features 108 in the form of a linear v-groove 116. The v-groove 116 comprises two planar facets F1 and F2 arranged with an angular separation α with respect to each other as shown inFIG. 1B . The angular separation α between the facets may vary from 15 degrees to 120 degrees. In some embodiments, the facets F1 and F2 may be of equal lengths. Alternatively in other embodiments, the length of one of the facets may be greater than the other. The distance between two consecutive v-grooves ‘A’ may vary between 0.01 to 0.5 mm. The width of the v-groove indicated by ‘b’ may vary between 0.001 to 0.100 mm while the depth of the v-groove indicated by ‘D’ may vary between 0.001 to 0.5 mm. -
FIG. 1C shows the perspective view of the embodiment described inFIG. 1A . As shown inFIG. 1C the embodiment described inFIG. 1C comprises of rows of linear v-grooves arranged along the bottom surface of thesubstrate 105. - Referring to
FIGS. 1A and 1C , aphoto cell 100 is disposed laterally with respect to thelight guide 104. The photo cell is configured to receive light guided through thelight guide 104 by the prismatic features 108. Thephoto cell 100 may comprise a single or a multiple layer p-n junction and may be formed of silicon, amorphous silicon or other semiconductor materials such as Cadmium telluride. In some embodiments,photo cell 100 based on photoelectrochemical cells, polymer or nanotechnology may be used.Photo cell 100 may also comprise thin multispectrum layers. The multispectrum layers may further comprise nanocrystals dispersed in polymers. Several multispectrum layers may be stacked to increase efficiency of thephoto cell 100.FIGS. 1A and 1B show an embodiment wherein thephoto cell 100 is disposed along one edge of the light guide 104 (for example, to the left of the light guide 104). However, another photo cell may be disposed at the other edge of thelight guide 104 as well (for example, to the right of the light guide 104). Other configurations of positioning the photo cell with respect to thelight guide 104 are also possible. - Ambient light that is incident on the upper surface of the
light guide 104 is transmitted through thelight guide 104 as indicated by thelight path 112. Upon striking a facet of theprismatic feature 108, the light is total internally reflected by multiple reflections from the upper and bottom surface of thelight guide 104. After striking the edge of thelight guide 104, the ray of light exits thelight guide 104 and is optically coupled to thephoto cell 100. Lenses or light pipes may be used to optically couple light from thelight guide 104 to thephoto cell 100. In one embodiment, for example, thelight guide 104 may be devoid ofprismatic features 108 towards the end closer to thephoto cell 100. The portion of thelight guide 104 without any prismatic features may function as a light pipe. The amount of light that can be collected and guided through the light guide will depend on the geometry, type and density of the prismatic features. The amount of light collected will also depend upon the refractive index of the light guiding material, which determines the numerical aperture. - Light is guided through the
light guide 104 by TIR. The guided light may suffer losses due to absorption in the light guide and scattering from other facets. To reduce this loss in the guided light, it is desirable to limit the length of thelight guide 104 to tens of inches so as to reduce the number of reflections. However, limiting the length of thelight guide 104 may reduce the area over which light is collected. Thus in some embodiments, the length of thelight guide 104 may be increased to greater than tens of inches. In some other embodiments, optical coatings may be deposited on the surface of thelight guide 104 to reduce Fresnel loss. - When the ray of light strikes the part of the light guide that is devoid of the
prismatic feature 108, it can be transmitted through the light guide and not be turned into the light guide. To reduce the amount of light escaping the light guide in this manner, it may be advantageous to stack several light guide layers comprising prismatic features wherein the prismatic features are offset with respect to each other as illustrated inFIG. 2 .FIG. 2 illustrates anexemplary embodiment 2 comprising a firstlight guiding layer 204 withprismatic features 208 and a secondlight guiding layer 212 withprismatic features 216. Aphoto cell 200 is disposed laterally with respect to the two light guiding layers 204 and 212. The prismatic features 208 and 216 are offset with respect to each other.Light ray 220 is turned and guided through thelight guide 204 as described above.Light ray 224 which passes through thelight guide 204 from point A is turned and guided through thelight guide 212. Offsetting theprismatic features - An advantage of using a prismatic light guiding plate, sheet or film to collect, concentrate and direct light towards a photo cell is that lesser number of photo cells maybe needed to achieve the desired electrical output. Thus this technique may possibly reduce the cost of generating energy with photo cells.
-
FIG. 3 shows a distribution of light rays incident on the light guide that are coupled into the light guide by the prismatic features. The distribution of the incident light includes twolobes Incident lobe 312 is close to the normal to the surface of the light guide. Theincident lobe 312 can span from near normal incidence to thelight guide 104 to approximately 45 degrees from the normal to thelight guide 104.Incident lobe 316 is oriented substantially parallel to the surface of the light guide. The angular spread of the incident lobe can range from approximately 45 degrees with respect to the surface of thelight guide 104 to approximately grazing angles to the surface of thelight guide 104. - It is generally known that the physical properties of the prismatic features can be varied to alter the size, shape and angle of the incidence lobes. For example,
FIG. 4 illustrates an embodiment comprising a light guide 404. Prismatic features 408 are disposed on the bottom surface of the light guide 404. Light incident on the upper surface of the light guide 404 is turned into the light guide 404 by theprismatic feature 408 and guided through the light guide 404 by TIR. The angular separation α between the facets comprising theprismatic feature 408 is large for example, greater than 90 degrees thereby resulting in wide prismatic features. The wide prismatic features can turn light incident at substantially grazing angles of incidence, for example, at approximately 5 degrees-45 degrees from the surface of the light guide 404. - By contrast, the embodiment shown in
FIG. 5 , the angular separation α between the facets of theprismatic features 508 is small for example, less than 90 degrees, thereby resulting in narrow angled facets. The wide prismatic features can turn light incident at angles substantially close to the normal to the surface, for example, at approximately 5 degrees-45 degrees from the normal to the surface of thelight guide 504. -
FIG. 6 shows an embodiment comprising of twolight guides photo cell 600.Light guide 604 further comprises of relatively narrowprismatic features 612 andlight guide 608 further comprises of relatively wideangled facets 616. Ray of light 620 close to the normal for example, at 5 degrees-45 degrees from the normal to the surface of the twolight guides light guide 604 with relatively narrow angled facets whereas the ray oflight 624 incident at grazing angle for example, at approximately 5 degrees-45 degrees to the surface of the twolight guides light guide 608 with relatively wider facets. - One advantage of this design is that light can be collected at a wide range of angles efficiently without mechanically rotating the film. Thus the dependence of the performance of the photo cell on the time of day and month of the year can be significantly reduced. For example, light from the sun may be incident on the light guide at grazing angles in morning and evening while the light from the sun may be incident on the light guide close to the normal around noon. The embodiment described above comprising multiple light guide layers with relatively narrow and wide angled facets will be able to collect light with approximately equal efficiency in the morning, afternoon and evening.
FIG. 7 illustrates an alternate embodiment comprising both narrow and wide angled facets on the same light guide. -
FIG. 8 illustrates an embodiment using a multi angle approach. In one embodiment, the elongated facets of the prismatic features or v grooves have non linear extent. The particular embodiment illustrated in embodiment comprises of a light guiding plate, sheet orfilm 800 formed from an optically transmissive material. Grooves are arranged alongconcentric circles 804 on the surface of thelight guiding plate 800. In some embodiments, the grooves may be disposed along elliptical paths. These grooves may be v shaped grooves as indicated by thecross-section 812. V grooves that are concentric can be fabricated using a similar fabrication process as linear v grooves. Such a light guide will accept light at a wide range of angles Φ azimuthal to the plane of thelight guide 800. The v grooves turn the light. Light then propagates to the center of the concentric pattern as indicated bylight ray 808 and is incident on aphoto cell 816 placed at the center of the concentric pattern. The embodiment described inFIG. 8 may be advantageous to collect diffused ambient light for example, in cloudy conditions. - In an alternate embodiment, as indicated in
FIG. 8A , aphoto cell 820 may be positioned at one corner of a light guiding plate, sheet orfilm 824. The light guiding plate, sheet or film may have rectangular, square or some other geometry. Grooves maybe formed on the light guiding plate, sheet or film along curves 828. The centers of thecurves 824 are not at the center of the light guiding plate, sheet orfilm 824. The centers of thecurves 828 are closer to the corner with thephoto cell 820 than the other corner. The grooves are concave and they face thephoto cell 820. The light guiding plate, sheet orfilm 824 comprisingcurved grooves 828 can collect light and turn it towards the concave side and direct the light to thephoto cell 820. Such a design comprising curvilinear prismatic features or grooves may be more efficient in light collecting than the design comprising photo cells disposed along one edge of a linear prismatic film. - As described above, in some embodiments the length of the light guide may be limited to tens of inches to reduce loss due to reflections. However, limiting the length of the light guide may reduce the area over which light is collected. In some applications it may be advantageous to collect light over a large area. In such cases, one approach can be a matrix pattern of micro-structure shown in
FIG. 9 may be beneficial. The embodiment shown inFIG. 9 illustrates a plurality ofelements 900 arranged in a matrix pattern. The matrix pattern may comprise of a plurality of rows and columns. The number of rows can be equal to the number of columns. The number of elements in any two rows may be different. Similarly, the number of elements in any two columns may be different as well. In some embodiments, the matrix pattern may be irregular. Elements in the matrix comprise a light guiding plate, sheet or film with a plurality ofv groove patterns 904 formed thereon. Other groove patterns besides v grooves can be used as well. Elements in the matrix may contain the same or different microstructure pattern. For example, the microstructure pattern in the different elements may vary in size, shape and type. Thus different elements in the matrix may collect sunlight at different angles.Photo cells 908 may be distributed within the periphery of the matrix as well as along the periphery of the matrix. The method disclosed above may be advantageous in fabricating large panels of light collectors coupled to photo cells for example, that can be fixed to roof tops of residential and commercial buildings. - In the embodiments shown in
FIG. 1A thephoto cell 100 is butted up against the edge of the light guiding plate, sheet orfilm 105. Instead it may be advantageous to bevel the light guiding plate, sheet or film at its edge so that light is redirected out of the light guiding plate, sheet or film towards a photo cell as shown inFIG. 10 .FIG. 10 illustrates an embodiment with a beveled light guiding plate, sheet orfilm 1004 comprising prismatic features 1008. The side view of the embodiment shown inFIG. 10 indicates a light guide with an upper surface S1 and a lower surface S2. The upper and lower surfaces S1 and S2 are bound on the left by an edge surface E1 and on the right by an edge surface E2. The edge surfaces E1 and E2 are inclined with respect to the upper and lower surfaces S1 and S2. The angle of inclination of the edge surfaces E1 and E2 with respect to upper and lower surfaces S1 and S2 is not equal to 90°. A ray of light 1012 is guided along the beveled light guide by total internal reflection and incident on aphoto cell 1000 disposed rearward of the light guiding plate orfilm 1004. Beveling the edge of the light guiding plate, sheet orfilm 1004 may simplify the alignment between thephoto cell 1000 and the light guiding plate, sheet orfilm 1004. - A ray of light 1012 incident on the upper surface of the light guiding plate, sheet or
film 1004 is turned into thelight guide 1004 by theprismatic feature 1008 and guided within thelight guide 1004 by total internal reflection from the upper and lower surfaces S1 and S2. On striking the inclined edge E1, the guidedlight ray 1012 is directed out of the light guide close to the normal to the lower surface S2 towards aphoto cell 1000 disposed rearward of thelight guide 1004. - It is conceivable to arrange a plurality of beveled light guides comprising prismatic features in a matrix pattern similar to the embodiment described in
FIG. 9 . The photocells in such an embodiment may be disposed underneath the matrix pattern. Ambient light incident on the upper surface of the matrix pattern is directed by the beveled edges of the light guides towards the photo cells disposed rearward of the matrix pattern. - In some embodiments it may be advantageous to collect light through the edge of the light guiding plate or film or a stack of light guiding plate or film comprising prismatic features as shown in
FIG. 11 .FIG. 11 illustrates an embodiment comprising a light guiding plate, sheet orfilm 1100. The light guide comprises four surfaces S1, S2, S3 and S4. Light is collected through a collection lens 1104 and incident on one surface S1 of thelight guide 1100. Prismatic features 1103 disposed are disposed on an adjacent surface S2 of thelight guide 1100. The light entering the light guiding plate, sheet orfilm 1100 is turned byprismatic features 1103 and guided by total internal reflection through the light guiding plate, sheet orfilm 1100. A ray of light indicated by 1112 is guided within thelight guide 1100 by total internal reflection from the two surfaces S2 and S3 adjacent to the input surface S1 until it strikes one of the facets of theprismatic feature 1103. Upon striking the facet, the ray of light 1112 is directed out of thelight guide 1100 towards thephoto cell 1108 disposed away from the surface comprising theprismatic features 1103 as indicated inFIG. 11 . However a ray of light indicated by 1116 which does not strike the prismatic feature and is thus not directed out of the light guiding plate, sheet orfilm 1100 is coupled back into the light guiding plate, sheet orfilm 1100 by areflector 1120 at the other end away from the collection lens 1104. -
FIG. 12A indicates the top view of a thin filmsolar concentrator 1200. The thin filmsolar concentrator 1200 is formed of an optically transmissive material and comprises two surfaces. The thin film solar concentrator hasconical cavities 1204 formed on the surface of the thin film solar concentrator away from the surface through which light is incident instead of elongate grooves.FIG. 12B indicates the side view of the thin film solar concentrator with the conical cavities. Referring again toFIG. 12A , theconical cavities 1204 are distributed throughout the light guiding thin film in a random or ordered manner. The thin filmsolar concentrator 1200 further comprisesphoto cells 1208 that are placed along two edges of the thin filmsolar concentrator 1200. In the embodiment illustrated inFIG. 12A ,reflectors 1212 are placed along the remaining edges of the thin filmsolar concentrator 1200 to increase light trapping efficiency. However, in alternate embodiments thereflectors 1212 may be replaced withphoto cells 1208. - The conical cavities indicated in
FIG. 12B have a circular cross section. However, conical cavities with elliptical cross section may be formed as well. Light incident on the surface of the thin filmsolar concentrator 1200 is total internally reflected by theconical cavities 1204 and directed toward thephoto cells 1208. The conical cavities are three dimensional structures and can thus accept light from a plurality of directions and reflect it along a plurality of directions. The embodiment described inFIG. 12A andFIG. 12B can collect light in a full solid angle and thus has greater light collecting capability. - In some embodiments, two light guiding layers with prismatic features may be stacked to collect ambient and reflected light as shown in
FIGS. 13A-13C . The embodiment illustrated inFIG. 13A comprises a toplight guiding layer 1305 and a bottomlight guiding layer 1307. (The terms top and bottom are only referred with respect to the drawings even though the structure can be reoriented.) Thelight guiding layers light guiding layer 1305 further comprises prismatic features disposed on the bottom surface S2. The bottomlight guiding layer 1307 comprises prismatic features disposed on the top surface Si. In some embodiments, the prismatic features on the two light guiding layers may be offset with respect to each other. In some embodiments, for example, wherein the twolight guiding layers light guiding layer 1305 and the bottomlight guiding layer 1307 are configured to reduce or avoid visual artifacts. The twolight guiding layers light guiding layers - The two
light guiding layers substrate 1301. Thesubstrate 1301 may be selected from a group consisting of a transparent substrate and may be a partially reflecting surface, a display device, a display device comprising an interferometric modulator (IMOD) or other suitable material. In some embodiments, thesubstrate 1301 may comprise a smart glass or switchable glass. Smart glass or switchable glass is a glass or glazing that can change its degree of transparency in response to an applied voltage. Smart glass or switchable glass can comprise electro-chromic devices, suspended particle devices or polymer dispersed liquid crystal devices. In electro-chromic devices, the smart glass is formed of an electro-chromic material. In some embodiments a layer of electro-chromic material may be disposed on the outer or inner surface of a transparent medium. The electro-chromic material can change its transparency between opaque, translucent and transparent in response to an electric voltage or current. Once a change has been effected, the electro-chromic material will maintain its degree of transparency even after the electrical voltage or current is removed. In embodiments comprising smart glass formed with suspended particle devices, a thin layer of particles in the form of a laminate, film or sheet may be disposed between two layers of transparent material such as glass or plastic. When no electrical voltage is applied, the particles may be arranged in a random fashion and may absorb or obstruct passage of light. However in response to an applied voltage, the particles may be aligned and may allow light to pass through them. In polymer dispersed liquid crystal devices, a layer of liquid crystal material may be disposed between two transparent layers comprising glass or plastic. Similar to the suspended particle devices, when no electrical voltage is applied the liquid crystals may be oriented in a random fashion and thus obstruct light. In response to an electrical voltage, the liquid crystals may be oriented along a direction and allow light to pass through them. The twolight guiding layers substrate 1301 by adhesive. In some embodiments, the twolight guiding layers substrate 1301. Thissubstrate 1301 may be diffusive in some embodiments. For example thesubstrate 1301 may have a diffusely reflective surface in certain embodiments. - A
photocell 1303 is disposed to one side (e.g., either to the left or to the right as shown inFIG. 13A or elsewhere) of the twolight guiding layers FIG. 13A , the photocell is disposed to the left of thelight guiding layers light guiding layer 1305 is deflected by the facet and guided through the toplight guiding layer 1305 toward thephotocell 1303. Thus, the toplight guiding layer 1305 can be used to capture a portion of the incident light. Some of the incident light may not strike a facet of the toplight guiding layer 1305. Some of the incident light that does not strike a facet of the toplight guiding layer 1305 may pass through the bottomlight guiding layer 1307 and thesubstrate 1301 as indicated byray 1311. Some of the incident light that does not strike a facet of the top light guiding layer 1305 (for e.g., ray 1313) may be reflected from the interface of the bottomlight guiding layer 1307 and thesubstrate 1301 out of the toplight guiding layer 1305 as indicated by theray 1315. However some of the reflected light may strike a facet on the top surface of the bottomlight guiding layer 1307 as indicated byray 1317 and be guided through the bottom light guiding layer towards thephotocell 1303. (As discussed above, thesubstrate 1301 may be diffusive, e.g., have a diffusely reflective surface. In some embodiments, a diffusing layer may be disposed on the substrate. Other designs can be used.) Thus the bottomlight guiding layer 1307 may capture light that is not collected by the toplight guiding layer 1305 and is reflected from thesubstrate 1301. Other configurations are also possible. - In some embodiments, the light collection ability of the light guiding layer can vary linearly with the density of the features. Thus to increase the amount of light captured by the two
light guiding layers - In some embodiments, the PV cells can be disposed to both sides of the
light guiding layers FIG. 13B . InFIG. 13B ,incident light 1309 is collected by the toplight guiding layer 1305 and directed towards photocell 1303 b disposed to the right of the light guiding layers. Additionally, the bottomlight guiding layer 1307 collects light reflected from thesubstrate 1301 and directed this collected light towards photocell 1303 a disposed to the left of the light guiding layers. As discussed above, thesubstrate 1301 may be diffusive, e.g., have a diffusely reflective surface. In some embodiments, a diffusing layer may be disposed on the substrate. Still other configurations are also possible. - In some embodiments, the top
light guiding layer 1305 may be excluded as illustrated inFIG. 13C . InFIG. 13C , two photocells 1303 a and 1303 b are disposed to the left and right respectively of thelight guiding layer 1307. Incident beam of light 1309 strikes a facet of the prismatic feature disposed on the top surface S1 of thelight guiding layer 1307 is refracted by the prismatic feature and is guided through thelight guiding layer 1307 towards photocell 1303 b. A beam of light 1313 that does not strike a facet enters thelight guiding layer 1307 and is reflected by thesubstrate 1301. As discussed above, thesubstrate 1301 may be diffusive, e.g., having a diffusely reflecting surface. In some embodiments, a diffusing layer may be disposed on the substrate. The reflectedray 1317 strikes a facet of the prismatic feature disposed on the top surface S1 of thelight guiding layer 1307 and is guided through the light guiding layer towards photocell 1303 a. In this manner a single light guiding layer can be used to collect both incident and reflected light. A wide variety of other configurations are also possible. - The method of using a light collecting plate, sheet or film comprising prismatic features to collect, concentrate and direct light to a photo cell can be used to realize solar cells that have increased efficiency and can be inexpensive, thin and lightweight. The solar cells comprising a light collecting plate, sheet or film coupled to a photo cell may be arranged to form panels of solar cells. Such panels of solar cells can be used in a variety of applications. For example, a panel of
solar cell 1404 comprising a plurality of light collecting light guides optically coupled to photo cells may be mounted on the roof top of a residential dwelling or a commercial building or placed on doors and windows as illustrated inFIG. 14 to provide supplemental electrical power to the home or business. The light collecting plate, sheet or film may be formed of a transparent or semi-transparent plate, sheet or film. The prismatic light collecting plate, sheet or film may be colorized (for example red or brown) for aesthetic purposes. The light collecting plate, sheet or film may be rigid or flexible. In some embodiments, the light collecting plate, sheet or film may be sufficiently flexible to be rolled. Solar cell panels comprising ofsuch sheets 1408 may be attached to window panes as shown inFIG. 14 . The light collecting sheets may be transparent to see through the window. Alternatively they might be colorized to block light. In other embodiments, the prismatic sheets may have wavelength filtering properties to filter out the ultra-violet radiation. - In other applications, light collecting plate, sheet or film may be mounted on cars and laptops as shown in
FIGS. 15 and 16 respectively to provide electrical power. InFIG. 15 the light collecting plate, sheet orfilm 1504 is mounted to the roof of an automobile.Photo cells 1508 can be disposed along the edges of thelight collector 1504. The electrical power generated by the photo cells can be used for example, to recharge the battery of a vehicle powered by gas, electricity or both or run electrical components as well. InFIG. 16 , the light collecting plate, sheet orfilm 1604 may be attached to the body (for example external casing) of a laptop. This is advantageous in providing electrical power to the laptop in the absence of electrical connection. Alternately, the light guiding collector optically coupled to photo cells may be used to recharge the laptop battery. - In alternate embodiments, the light collecting plate, sheet or film optically coupled to photo cells may be attached to articles of clothing or shoes. For example
FIG. 17 illustrates a jacket or vest comprising the light collecting plate, sheet orfilm 1704 optically coupled tophoto cells 1708 disposed around the lower periphery of the jacket or vest. In alternate embodiments, thephoto cells 1708 may be disposed anywhere on the jacket or vest. The light collecting plate, sheet orfilm 1704 may collect, concentrate and direct ambient light to thephoto cells 1708. The electricity generated by thephoto cells 1708 may be used to power handheld devices such as PDAs, mp3 players, cell phone etc. Alternately, the electricity generated by thephoto cells 1708 may be used to light the vests and jackets worn by airline ground crew, police, fire fighters and emergency workers in the dark to increase visibility. In another embodiment illustrated inFIG. 18 , the light collecting plate, sheet orfilm 1804 may be disposed on a shoe.Photo cells 1808 may be disposed along the edges of the light collecting plate, sheet orfilm 1804. - Panels of solar cells comprising of prismatic light collecting plate, sheet or film coupled to photo cells may be mounted on planes, trucks, trains, bicycles, sail boats and satellites as well. For example as shown in
FIG. 19 , light collecting plate, sheet orfilm 1904 may be attached to the wings of an airplane or window panes of the airplane.Photo cells 1908 may be disposed along the edges of the light collecting plate, sheet or film as illustrated inFIG. 19 . The electricity generated may be used to provide power to parts of the aircraft.FIG. 20 illustrates the use of light collectors coupled to photo cells to power navigation instruments or devices in a boat for example, refrigerator, television and other electrical equipments. The light collecting plate, sheet orfilm 2004 is attached to the sail of a sail boat or alternately to the body of the boat.PV cells 2008 are disposed at the edges of the light collecting plate, sheet orfilm 2004. In alternate embodiments, the light collecting plate, sheet orfilm 2004 may be attached to the body of the sail boat for example, the cabin hole or deck. Light collecting plate, sheet orfilm 2104 may be mounted on bicycles as indicated inFIG. 21 .FIG. 22 illustrates yet another application of the light collecting plate, sheet or film optically coupled to photo cells to provide power to communication, weather and other types of satellites. -
FIG. 23 illustrates alight collecting sheet 2304 that is sufficiently flexible to be rolled. The light collecting sheet is optically coupled to photo cells. The embodiment described inFIG. 23 may be rolled and carried on camping or backpacking trips to generate electrical power outdoors and in remote locations where electrical connection is sparse. Additionally, the light collecting plate, sheet or film that is optically coupled to photo cells may be attached to a wide variety of structures and products to provide electricity. - The light collecting plate, sheet or film optically coupled to photo cells may have an added advantage of being modular. For example, depending on the design, the photo cells may be configured to be selectively attachable to and detachable from the light collecting plate, sheet or film. Thus existing photo cells can be replaced periodically with newer and more efficient photo cells without having to replace the entire system. This ability to replace photo cells may reduce the cost of maintenance and upgrades substantially.
- A wide variety of other variations are also possible. Films, layers, components, and/or elements may be added, removed, or rearranged. Additionally, processing steps may be added, removed, or reordered. Also, although the terms film and layer have been used herein, such terms as used herein include film stacks and multilayers. Such film stacks and multilayers may be adhered to other structures using adhesive or may be formed on other structures using deposition or in other manners.
- The examples described above are merely exemplary and those skilled in the art may now make numerous uses of, and departures from, the above-described examples without departing from the inventive concepts disclosed herein. Various modifications to these examples may be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other examples, without departing from the spirit or scope of the novel aspects described herein. Thus, the scope of the disclosure is not intended to be limited to the examples shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. The word “exemplary” is used exclusively herein to mean “serving as an example, instance, or illustration.” Any example described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other examples.
Claims (93)
Priority Applications (16)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/941,851 US20090126792A1 (en) | 2007-11-16 | 2007-11-16 | Thin film solar concentrator/collector |
EP08153692A EP2061092A1 (en) | 2007-11-16 | 2008-03-31 | Thin film planar solar concentrator/collector |
EP08153694A EP2061093A1 (en) | 2007-11-16 | 2008-03-31 | Planar thin film solar concentrator/collector |
KR1020107013131A KR20100096170A (en) | 2007-11-16 | 2008-11-10 | Thin film solar concentrator/collector |
PCT/US2008/083053 WO2009064701A1 (en) | 2007-11-16 | 2008-11-10 | Thin film solar concentrator/collector |
CN2008801210353A CN101904016A (en) | 2007-11-16 | 2008-11-10 | Thin film planar solar concentrator/collector |
JP2010534118A JP2011503902A (en) | 2007-11-16 | 2008-11-10 | Thin film solar concentrator / collector |
TW097144265A TW200937655A (en) | 2007-11-16 | 2008-11-14 | Thin film solar concentrator/collector |
US12/271,694 US8941631B2 (en) | 2007-11-16 | 2008-11-14 | Simultaneous light collection and illumination on an active display |
KR1020107013130A KR20100094511A (en) | 2007-11-16 | 2008-11-14 | Thin film planar sonar concentrator/ collector and diffusor used with an active display |
PCT/US2008/083678 WO2009065069A1 (en) | 2007-11-16 | 2008-11-14 | Thin film planar sonar concentrator/ collector and diffusor used with an active display |
JP2010534246A JP5314039B2 (en) | 2007-11-16 | 2008-11-14 | Simultaneous focusing and illumination for active displays |
EP08850050A EP2210282A1 (en) | 2007-11-16 | 2008-11-14 | Thin film planar sonar concentrator/ collector and diffusor used with an active display |
TW97144259A TWI467523B (en) | 2007-11-16 | 2008-11-14 | Simultaneous light collection and illumination on an active display |
CN200880116109.4A CN101861658B (en) | 2007-11-16 | 2008-11-14 | Light collection of active display |
JP2012260856A JP2013061149A (en) | 2007-11-16 | 2012-11-29 | Thin film solar concentrator/collector |
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Cited By (113)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060066511A1 (en) * | 2004-09-27 | 2006-03-30 | Clarence Chui | Systems and methods using interferometric optical modulators and diffusers |
US20060066783A1 (en) * | 2004-09-27 | 2006-03-30 | Sampsell Jeffrey B | Methods and devices for lighting displays |
US20060077522A1 (en) * | 2004-09-27 | 2006-04-13 | Manish Kothari | Method and device for compensating for color shift as a function of angle of view |
US20080049450A1 (en) * | 2006-08-28 | 2008-02-28 | Sampsell Jeffrey B | Angle sweeping holographic illuminator |
US20080084602A1 (en) * | 2006-10-06 | 2008-04-10 | Gang Xu | Internal optical isolation structure for integrated front or back lighting |
US20080267572A1 (en) * | 2007-04-30 | 2008-10-30 | Qualcomm Mems Technologies, Inc. | Dual film light guide for illuminating displays |
US20090140962A1 (en) * | 2006-08-17 | 2009-06-04 | Hyun Ha Hwang | Display Device and Mobile Terminal Having the Same |
US20090151771A1 (en) * | 2007-12-17 | 2009-06-18 | Qualcomm Mems Technologies, Inc. | Photovoltaics with interferometric ribbon masks |
US20090199900A1 (en) * | 2008-02-12 | 2009-08-13 | Qualcomm Mems Technologies, Inc. | Thin film holographic solar concentrator/collector |
US20090201571A1 (en) * | 2008-02-12 | 2009-08-13 | Qualcomm Mems Technologies, Inc. | Integrated front light diffuser for reflective displays |
US20090257108A1 (en) * | 2008-04-15 | 2009-10-15 | Qualcomm Mems Technologies, Inc. | Light with bi-directional propagation |
US20090255569A1 (en) * | 2008-04-11 | 2009-10-15 | Qualcomm Mems Technologies, Inc. | Method to improve pv aesthetics and efficiency |
US20090296193A1 (en) * | 2008-05-28 | 2009-12-03 | Qualcomm Mems Technologies, Inc. | Front Light Devices and Methods of Fabrication Thereof |
US20090310208A1 (en) * | 2006-02-17 | 2009-12-17 | Qualcomm Mems Technologies, Inc. | Method and apparatus for providing back-lighting in a display device |
US20100051089A1 (en) * | 2008-09-02 | 2010-03-04 | Qualcomm Mems Technologies, Inc. | Light collection device with prismatic light turning features |
US7706050B2 (en) | 2004-03-05 | 2010-04-27 | Qualcomm Mems Technologies, Inc. | Integrated modulator illumination |
US20100108056A1 (en) * | 2008-11-06 | 2010-05-06 | Industrial Technology Research Institute | Solar energy collecting module |
US20100141557A1 (en) * | 2006-10-06 | 2010-06-10 | Qualcomm Mems Technologies, Inc. | Light guide |
US20100172012A1 (en) * | 2004-09-27 | 2010-07-08 | Idc, Llc | System and method of reducing color shift in a display |
US20100180928A1 (en) * | 2009-01-16 | 2010-07-22 | Genie Lens Technologies, Llc | Solar arrays and other photovoltaic (pv) devices using pv enhancement films for trapping light |
US20100181014A1 (en) * | 2009-01-16 | 2010-07-22 | Genie Lens Technologies, Llc | Method of manufacturing photovoltaic (pv) enhancement films |
US20100180929A1 (en) * | 2009-01-16 | 2010-07-22 | Genie Lens Technologies, Llc | Photovoltaic (pv) enhancement films for enhancing optical path lengths and for trapping reflected light |
US20100180946A1 (en) * | 2008-09-18 | 2010-07-22 | Qualcomm Mems Technologies, Inc. | Increasing the angular range of light collection in solar collectors/concentrators |
US7766498B2 (en) | 2006-06-21 | 2010-08-03 | Qualcomm Mems Technologies, Inc. | Linear solid state illuminator |
US7777954B2 (en) * | 2007-01-30 | 2010-08-17 | Qualcomm Mems Technologies, Inc. | Systems and methods of providing a light guiding layer |
US20100278480A1 (en) * | 2009-04-21 | 2010-11-04 | Vasylyev Sergiy V | Light collection and illumination systems employing planar waveguide |
US20100281721A1 (en) * | 2009-05-06 | 2010-11-11 | Industrial Technology Research Institute | Multi-function solar-powered lighting system |
WO2010151253A1 (en) * | 2009-06-24 | 2010-12-29 | University Of Rochester | Dimpled light collection and concentration system, components thereof, and methods |
US7864395B2 (en) | 2006-10-27 | 2011-01-04 | Qualcomm Mems Technologies, Inc. | Light guide including optical scattering elements and a method of manufacture |
US20110005595A1 (en) * | 2009-07-13 | 2011-01-13 | Yu-Chih Yang | Solar cell module and the fabrication method of the same |
US7873257B2 (en) | 2007-05-01 | 2011-01-18 | Morgan Solar Inc. | Light-guide solar panel and method of fabrication thereof |
US7907319B2 (en) | 1995-11-06 | 2011-03-15 | Qualcomm Mems Technologies, Inc. | Method and device for modulating light with optical compensation |
US20110079267A1 (en) * | 2009-10-02 | 2011-04-07 | Genie Lens Technologies, Llc | Lens system with directional ray splitter for concentrating solar energy |
WO2011083907A2 (en) * | 2010-05-07 | 2011-07-14 | Jung Taerok | Light guide device having plurality of channels |
US8040589B2 (en) | 2008-02-12 | 2011-10-18 | Qualcomm Mems Technologies, Inc. | Devices and methods for enhancing brightness of displays using angle conversion layers |
US8045252B2 (en) | 2004-02-03 | 2011-10-25 | Qualcomm Mems Technologies, Inc. | Spatial light modulator with integrated optical compensation structure |
US8068710B2 (en) | 2007-12-07 | 2011-11-29 | Qualcomm Mems Technologies, Inc. | Decoupled holographic film and diffuser |
US8107155B2 (en) | 2006-10-06 | 2012-01-31 | Qualcomm Mems Technologies, Inc. | System and method for reducing visual artifacts in displays |
US8111446B2 (en) | 2004-09-27 | 2012-02-07 | Qualcomm Mems Technologies, Inc. | Optical films for controlling angular characteristics of displays |
US20120038841A1 (en) * | 2009-04-24 | 2012-02-16 | Alphamicron, Inc. | Solar powered variable light attenuating devices and arrangements |
KR101118443B1 (en) | 2010-01-26 | 2012-03-06 | 박기성 | Concentrated solar cell module |
CN102376784A (en) * | 2010-08-23 | 2012-03-14 | 晶元光电股份有限公司 | Solar cell module and electromagnetic wave collecting device thereof |
US20120134243A1 (en) * | 2010-11-29 | 2012-05-31 | Casio Computer Co., Ltd. | Electronic device and watch |
US20120140604A1 (en) * | 2010-12-07 | 2012-06-07 | Seiko Epson Corporation | Timepiece faceplate and timepiece |
US20120155225A1 (en) * | 2010-12-20 | 2012-06-21 | Seiko Epson Corporation | Timepiece faceplate and timepiece |
US20120163135A1 (en) * | 2010-12-27 | 2012-06-28 | Seiko Epson Corporation | Timepiece faceplate, and timepiece |
US20120199198A1 (en) * | 2009-10-26 | 2012-08-09 | Hebrink Timothy J | Structured film and articles made therefrom |
US20120214556A1 (en) * | 2011-02-17 | 2012-08-23 | Nokia Corporation | Method and Apparatus for Solar Cell Light Concentrator Panel |
US20120234371A1 (en) * | 2011-03-18 | 2012-09-20 | Tong Zhang | Incident angle dependent smart solar concentrator |
US8290318B2 (en) | 2009-04-21 | 2012-10-16 | Svv Technology Innovations, Inc. | Light trapping optical cover |
US20120294578A1 (en) * | 2009-06-24 | 2012-11-22 | Rambus Inc. | Light collecting and emitting apparatus, method, and applications |
US8328403B1 (en) | 2012-03-21 | 2012-12-11 | Morgan Solar Inc. | Light guide illumination devices |
US8358266B2 (en) | 2008-09-02 | 2013-01-22 | Qualcomm Mems Technologies, Inc. | Light turning device with prismatic light turning features |
US8368981B2 (en) | 2006-10-10 | 2013-02-05 | Qualcomm Mems Technologies, Inc. | Display device with diffractive optics |
US20130044573A1 (en) * | 2011-08-18 | 2013-02-21 | Seiko Epson Corporation | Manufacturing method of timepiece dial, timepiece dial, and timepiece |
US20130051196A1 (en) * | 2011-08-25 | 2013-02-28 | Seiko Epson Corporation | Timepiece dial and timepiece |
US20130064048A1 (en) * | 2011-09-12 | 2013-03-14 | Seiko Epson Corporation | Timepiece dial, and timepiece |
US20130070574A1 (en) * | 2011-09-15 | 2013-03-21 | Seiko Epson Corporation | Timepiece rotating display member, and timepiece |
US20130133736A1 (en) * | 2010-03-16 | 2013-05-30 | Koninklijke Philips Electronics N.V. | Photovoltaic cell device with switchable lighting/reflection |
CN103227215A (en) * | 2010-08-23 | 2013-07-31 | 晶元光电股份有限公司 | Solar cell module and electromagnetic wave collecting device thereof |
US20130233372A1 (en) * | 2010-11-22 | 2013-09-12 | Sharp Kabushiki Kaisha | Solar cell module and solar power generation apparatus |
US20130240037A1 (en) * | 2010-11-24 | 2013-09-19 | Sharp Kabushiki Kaisha | Solar cell module and solar generator |
JP2013543150A (en) * | 2010-11-04 | 2013-11-28 | バニヤン エナジー インコーポレイテッド | Compact optical components for heat collection and lighting systems |
US20130319505A1 (en) * | 2012-06-05 | 2013-12-05 | Qualcomm Mems Technologies, Inc | Photovoltaic power generating window |
US20130333742A1 (en) * | 2012-06-15 | 2013-12-19 | Chi Lin Technology Co., Ltd. | Power generating window set and power generating module thereof |
US8735791B2 (en) | 2010-07-13 | 2014-05-27 | Svv Technology Innovations, Inc. | Light harvesting system employing microstructures for efficient light trapping |
US8740397B2 (en) | 2011-01-18 | 2014-06-03 | Svv Technology Innovations, Inc. | Optical cover employing microstructured surfaces |
US20140158197A1 (en) * | 2012-12-07 | 2014-06-12 | Qualcomm Mems Technologies, Inc. | Tri-functional light and energy generating panel system |
US8755665B2 (en) | 2010-06-30 | 2014-06-17 | Epistar Corporation | Electromagnetic wave gathering device and solar cell module having the same |
WO2014116498A1 (en) | 2013-01-23 | 2014-07-31 | Dow Global Technologies Llc | Solar waveguide concentrator |
US8797628B2 (en) | 2007-10-19 | 2014-08-05 | Qualcomm Memstechnologies, Inc. | Display with integrated photovoltaic device |
US20140261621A1 (en) * | 2013-03-14 | 2014-09-18 | Qualcomm Mems Technologies, Inc. | Window solar harvesting means |
WO2014176251A1 (en) * | 2013-04-23 | 2014-10-30 | Lumenco, Llc | Multi-layered waveguide for capturing solar energy |
US8885995B2 (en) | 2011-02-07 | 2014-11-11 | Morgan Solar Inc. | Light-guide solar energy concentrator |
US8902484B2 (en) | 2010-12-15 | 2014-12-02 | Qualcomm Mems Technologies, Inc. | Holographic brightness enhancement film |
US8928967B2 (en) | 1998-04-08 | 2015-01-06 | Qualcomm Mems Technologies, Inc. | Method and device for modulating light |
US8941631B2 (en) | 2007-11-16 | 2015-01-27 | Qualcomm Mems Technologies, Inc. | Simultaneous light collection and illumination on an active display |
US8971675B2 (en) | 2006-01-13 | 2015-03-03 | Qualcomm Mems Technologies, Inc. | Interconnect structure for MEMS device |
US8970767B2 (en) | 2011-06-21 | 2015-03-03 | Qualcomm Mems Technologies, Inc. | Imaging method and system with angle-discrimination layer |
US8979349B2 (en) | 2009-05-29 | 2015-03-17 | Qualcomm Mems Technologies, Inc. | Illumination devices and methods of fabrication thereof |
US9019183B2 (en) | 2006-10-06 | 2015-04-28 | Qualcomm Mems Technologies, Inc. | Optical loss structure integrated in an illumination apparatus |
US9025235B2 (en) | 2002-12-25 | 2015-05-05 | Qualcomm Mems Technologies, Inc. | Optical interference type of color display having optical diffusion layer between substrate and electrode |
US9040808B2 (en) | 2007-05-01 | 2015-05-26 | Morgan Solar Inc. | Light-guide solar panel and method of fabrication thereof |
TWI491932B (en) * | 2012-10-24 | 2015-07-11 | Univ Nat Central | Light guide device |
US9110289B2 (en) | 1998-04-08 | 2015-08-18 | Qualcomm Mems Technologies, Inc. | Device for modulating light with multiple electrodes |
US9310551B2 (en) | 2010-10-11 | 2016-04-12 | 3M Innovative Properties Company | Illumination device having viscoelastic lightguide |
US9337373B2 (en) | 2007-05-01 | 2016-05-10 | Morgan Solar Inc. | Light-guide solar module, method of fabrication thereof, and panel made therefrom |
US20160154484A1 (en) * | 2013-07-17 | 2016-06-02 | Stabilo International Gmbh | Energy Savings in an Electronic Pen |
US9435934B2 (en) | 2013-03-15 | 2016-09-06 | Morgan Solar Inc. | Optics for solar concentrators |
US20160268467A1 (en) * | 2013-11-22 | 2016-09-15 | Massachusetts Institute Of Technology | Metallic photovoltaics |
US9464783B2 (en) | 2013-03-15 | 2016-10-11 | John Paul Morgan | Concentrated photovoltaic panel |
US9496443B2 (en) | 2011-04-22 | 2016-11-15 | Sharp Kabushiki Kaisha | Solar cell module and solar power generation apparatus |
US20160376037A1 (en) | 2014-05-14 | 2016-12-29 | California Institute Of Technology | Large-Scale Space-Based Solar Power Station: Packaging, Deployment and Stabilization of Lightweight Structures |
US9595912B2 (en) | 2012-12-19 | 2017-03-14 | Kabushiki Kaisha Toshiba | Light concentrator and a solar cell |
US9780233B2 (en) | 2012-08-10 | 2017-10-03 | Sharp Kabushiki Kaisha | Solar cell module, solar cell module assembly, and solar photovoltaic power generation system |
CN110094887A (en) * | 2013-07-01 | 2019-08-06 | 3M创新有限公司 | Solar energy equipment |
US10454565B2 (en) | 2015-08-10 | 2019-10-22 | California Institute Of Technology | Systems and methods for performing shape estimation using sun sensors in large-scale space-based solar power stations |
US10696428B2 (en) | 2015-07-22 | 2020-06-30 | California Institute Of Technology | Large-area structures for compact packaging |
US20200209637A1 (en) * | 2018-12-27 | 2020-07-02 | Sl Corporation | Lamp for vehicle |
US10718479B2 (en) | 2016-11-03 | 2020-07-21 | Basf Se | Daylighting illumination system |
US10992253B2 (en) | 2015-08-10 | 2021-04-27 | California Institute Of Technology | Compactable power generation arrays |
US11063106B2 (en) | 2015-02-09 | 2021-07-13 | Samsung Display Co., Ltd. | Top emission device and organic light-emitting diode display device |
US11128179B2 (en) | 2014-05-14 | 2021-09-21 | California Institute Of Technology | Large-scale space-based solar power station: power transmission using steerable beams |
US11296057B2 (en) | 2017-01-27 | 2022-04-05 | EcoSense Lighting, Inc. | Lighting systems with high color rendering index and uniform planar illumination |
US11339932B2 (en) | 2017-03-09 | 2022-05-24 | Korrus, Inc. | Fixtures and lighting accessories for lighting devices |
US11353200B2 (en) | 2018-12-17 | 2022-06-07 | Korrus, Inc. | Strip lighting system for direct input of high voltage driving power |
US11359796B2 (en) | 2016-03-08 | 2022-06-14 | Korrus, Inc. | Lighting system with lens assembly |
US11362228B2 (en) | 2014-06-02 | 2022-06-14 | California Institute Of Technology | Large-scale space-based solar power station: efficient power generation tiles |
DE102020133069A1 (en) | 2020-12-11 | 2022-06-15 | Audi Aktiengesellschaft | Transparent solar panel |
US11456397B2 (en) | 2019-03-12 | 2022-09-27 | E Ink Corporation | Energy harvesting electro-optic displays |
US11578857B2 (en) | 2018-05-01 | 2023-02-14 | Korrus, Inc. | Lighting systems and devices with central silicone module |
US11634240B2 (en) | 2018-07-17 | 2023-04-25 | California Institute Of Technology | Coilable thin-walled longerons and coilable structures implementing longerons and methods for their manufacture and coiling |
US11772826B2 (en) | 2018-10-31 | 2023-10-03 | California Institute Of Technology | Actively controlled spacecraft deployment mechanism |
Families Citing this family (61)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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JP2012531623A (en) * | 2009-06-24 | 2012-12-10 | ユニバーシティー オブ ロチェスター | Stepped light collection and collection system, components thereof, and methods |
US9246038B2 (en) | 2009-06-24 | 2016-01-26 | University Of Rochester | Light collecting and emitting apparatus, method, and applications |
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WO2011114240A2 (en) * | 2010-03-19 | 2011-09-22 | Morgan Solar Inc. | Solar-light concentration apparatus |
US20130104984A1 (en) * | 2010-06-11 | 2013-05-02 | Morgan Solar Inc. | Monolithic photovoltaic solar concentrator |
DE102010025676A1 (en) | 2010-06-25 | 2011-12-29 | Friedrich Faig | Optical light-emitting surface for e.g. solar concentrator, has prismatic elements inserted into basic structure such that refractive effect of prismatic elements is complemented to refractive effect of another base structure |
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JPWO2012033132A1 (en) * | 2010-09-07 | 2014-01-20 | 株式会社ニコン | Condensing device, photovoltaic power generation device, and photothermal conversion device |
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GB201017997D0 (en) * | 2010-10-25 | 2010-12-08 | Press Graham A | Solar compressor (High efficiency multi faceted photo voltaic array) |
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CN102544172B (en) * | 2010-12-30 | 2015-10-21 | 财团法人工业技术研究院 | Focusing-type solar energy light guide module |
TWI505489B (en) | 2011-02-11 | 2015-10-21 | Wintek Corp | Light collection module and solar energy device |
US8791355B2 (en) * | 2011-04-20 | 2014-07-29 | International Business Machines Corporation | Homogenizing light-pipe for solar concentrators |
JP2014167947A (en) * | 2011-06-27 | 2014-09-11 | Sharp Corp | Photovoltaic power generation device |
US9097826B2 (en) | 2011-10-08 | 2015-08-04 | Svv Technology Innovations, Inc. | Collimating illumination systems employing a waveguide |
US20130118547A1 (en) * | 2011-11-11 | 2013-05-16 | QUACLOMM MEMS Technologies, Inc. | Photovoltaic window with light-turning features |
WO2013069785A1 (en) * | 2011-11-11 | 2013-05-16 | シャープ株式会社 | Light guide body, solar cell module, and photovoltaic power generation device |
US20130220399A1 (en) * | 2012-02-23 | 2013-08-29 | Qualcomm Mems Technologies, Inc. | Hybrid wedge shaped/microstructured light collector |
JP2013243305A (en) * | 2012-05-22 | 2013-12-05 | Sharp Corp | Solar cell module and solar power generating apparatus |
TWI473279B (en) * | 2012-05-25 | 2015-02-11 | Univ Nat Central | Solar concentrator |
CN103424857B (en) * | 2012-05-25 | 2016-03-30 | 中央大学 | Planar solar concentrator |
US20150162474A1 (en) * | 2012-06-01 | 2015-06-11 | Sharp Kabushiki Kaisha | Solar cell module and solar power generation device |
TWI574424B (en) * | 2012-12-28 | 2017-03-11 | 聚森股份有限公司 | Light guiding and power generating window set and light guiding and power generating module thereof |
JP2015216138A (en) * | 2012-09-10 | 2015-12-03 | シャープ株式会社 | Solar cell module and photovoltaic power generation device |
CN103807785B (en) * | 2012-11-08 | 2015-07-22 | 佛山正能光电有限公司 | Solar lighting system |
TWI468737B (en) * | 2012-11-08 | 2015-01-11 | Univ Nat Taiwan Science Tech | Layer upon layer of optical disk |
TW201428223A (en) * | 2013-01-11 | 2014-07-16 | Ind Tech Res Inst | Light collecting element and light collecting module |
EP2765353B1 (en) * | 2013-02-06 | 2018-11-07 | Hartmut S. Engel | Lamp with a Light conducting disc assembly |
TWI642201B (en) * | 2013-02-08 | 2018-11-21 | 劉鴻達 | Flexible light concentrating module and display unit comprising the same |
US9595627B2 (en) | 2013-03-15 | 2017-03-14 | John Paul Morgan | Photovoltaic panel |
US9714756B2 (en) | 2013-03-15 | 2017-07-25 | Morgan Solar Inc. | Illumination device |
US9960303B2 (en) | 2013-03-15 | 2018-05-01 | Morgan Solar Inc. | Sunlight concentrating and harvesting device |
CN104075222A (en) * | 2013-03-28 | 2014-10-01 | 佛山正能光电有限公司 | Natural illumination solar device |
CN105492955A (en) | 2013-09-01 | 2016-04-13 | 瓦伦·阿库尔·文卡特山 | Optical device for light collection |
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US9298284B2 (en) * | 2014-03-11 | 2016-03-29 | Qualcomm Incorporated | System and method for optically-based active stylus input recognition |
KR102603829B1 (en) * | 2014-11-13 | 2023-11-17 | 에이엠에스-오스람 아시아 퍼시픽 피티이. 리미티드 | Manufacture of optical light guides |
KR102356993B1 (en) * | 2015-02-09 | 2022-01-28 | 삼성디스플레이 주식회사 | Top emission device and organic light-emitting diode display device |
IT201600097814A1 (en) * | 2016-09-29 | 2018-03-29 | Smtech S R L Unipersonale | AN OPTICAL SENSOR |
GB201715884D0 (en) * | 2017-09-29 | 2017-11-15 | Sola Daniel John Peter | Support member for a load-bearing structure |
CN107659260A (en) * | 2017-10-01 | 2018-02-02 | 深圳市普耐科技有限公司 | A kind of photovoltaic power generation equipment |
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Citations (77)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2677714A (en) * | 1951-09-21 | 1954-05-04 | Alois Vogt Dr | Optical-electrical conversion device comprising a light-permeable metal electrode |
US3247392A (en) * | 1961-05-17 | 1966-04-19 | Optical Coating Laboratory Inc | Optical coating and assembly used as a band pass interference filter reflecting in the ultraviolet and infrared |
US4116718A (en) * | 1978-03-09 | 1978-09-26 | Atlantic Richfield Company | Photovoltaic array including light diffuser |
US4154219A (en) * | 1977-03-11 | 1979-05-15 | E-Systems, Inc. | Prismatic solar reflector apparatus and method of solar tracking |
US4200472A (en) * | 1978-06-05 | 1980-04-29 | The Regents Of The University Of California | Solar power system and high efficiency photovoltaic cells used therein |
US4282862A (en) * | 1979-11-09 | 1981-08-11 | Soleau Bertrand S | Thin-line collectors |
US4357486A (en) * | 1978-03-16 | 1982-11-02 | Atlantic Richfield Company | Luminescent solar collector |
US4400577A (en) * | 1981-07-16 | 1983-08-23 | Spear Reginald G | Thin solar cells |
US4497974A (en) * | 1982-11-22 | 1985-02-05 | Exxon Research & Engineering Co. | Realization of a thin film solar cell with a detached reflector |
US4633031A (en) * | 1982-09-24 | 1986-12-30 | Todorof William J | Multi-layer thin film, flexible silicon alloy photovoltaic cell |
US4688068A (en) * | 1983-07-08 | 1987-08-18 | The United States Of America As Represented By The Department Of Energy | Quantum well multijunction photovoltaic cell |
US4863224A (en) * | 1981-10-06 | 1989-09-05 | Afian Viktor V | Solar concentrator and manufacturing method therefor |
US5110370A (en) * | 1990-09-20 | 1992-05-05 | United Solar Systems Corporation | Photovoltaic device with decreased gridline shading and method for its manufacture |
US5123247A (en) * | 1990-02-14 | 1992-06-23 | 116736 (Canada) Inc. | Solar roof collector |
US5261970A (en) * | 1992-04-08 | 1993-11-16 | Sverdrup Technology, Inc. | Optoelectronic and photovoltaic devices with low-reflectance surfaces |
US5356488A (en) * | 1991-12-27 | 1994-10-18 | Rudolf Hezel | Solar cell and method for its manufacture |
US5578140A (en) * | 1994-02-01 | 1996-11-26 | Yeda Research And Development Co., Ltd. | Solar energy plant |
US5720827A (en) * | 1996-07-19 | 1998-02-24 | University Of Florida | Design for the fabrication of high efficiency solar cells |
US5726805A (en) * | 1996-06-25 | 1998-03-10 | Sandia Corporation | Optical filter including a sub-wavelength periodic structure and method of making |
US5782995A (en) * | 1993-11-05 | 1998-07-21 | Citizen Watch Co., Ltd. | Solar battery device and method of fabricating the same |
US5782993A (en) * | 1996-06-28 | 1998-07-21 | Ponewash; Jackie | Photovoltaic cells having micro-embossed optical enhancing structures |
US5877874A (en) * | 1995-08-24 | 1999-03-02 | Terrasun L.L.C. | Device for concentrating optical radiation |
US5886688A (en) * | 1995-06-02 | 1999-03-23 | National Semiconductor Corporation | Integrated solar panel and liquid crystal display for portable computer or the like |
US5961198A (en) * | 1996-02-02 | 1999-10-05 | Hitachi, Ltd. | Liquid crystal display device and method of manufacturing backlighting light guide panel therefor |
US6008449A (en) * | 1997-08-19 | 1999-12-28 | Cole; Eric D. | Reflective concentrating solar cell assembly |
US6021007A (en) * | 1997-10-18 | 2000-02-01 | Murtha; R. Michael | Side-collecting lightguide |
US6040937A (en) * | 1994-05-05 | 2000-03-21 | Etalon, Inc. | Interferometric modulation |
US6123431A (en) * | 1997-03-19 | 2000-09-26 | Sanyo Electric Co., Ltd | Backlight apparatus and light guide plate |
US20010006066A1 (en) * | 1998-07-27 | 2001-07-05 | Matthew Cherney | Solar energy systems and related hardware |
US6300558B1 (en) * | 1999-04-27 | 2001-10-09 | Japan Energy Corporation | Lattice matched solar cell and method for manufacturing the same |
US6323892B1 (en) * | 1998-08-04 | 2001-11-27 | Olympus Optical Co., Ltd. | Display and camera device for videophone and videophone apparatus |
US6323923B1 (en) * | 1998-04-17 | 2001-11-27 | Seiko Instruments R&D Center Inc. | Reflective type LCD having a solar cell formed of same material and same surface as an active element |
US6323415B1 (en) * | 1998-09-18 | 2001-11-27 | Hitachi, Ltd. | Light concentrator photovoltaic module method of manufacturing same and light concentrator photovoltaic system |
US20020050286A1 (en) * | 1998-03-25 | 2002-05-02 | Tdk Corporation | Solar battery module |
US20030026536A1 (en) * | 2001-08-02 | 2003-02-06 | Edward Ho | Apparatus and method for collecting light |
US6518944B1 (en) * | 1999-10-25 | 2003-02-11 | Kent Displays, Inc. | Combined cholesteric liquid crystal display and solar cell assembly device |
US6580496B2 (en) * | 2000-11-09 | 2003-06-17 | Canesta, Inc. | Systems for CMOS-compatible three-dimensional image sensing using quantum efficiency modulation |
US20030128538A1 (en) * | 2000-02-28 | 2003-07-10 | Masayuki Shinohara | Surface light source, method for manufacturing the same and apparatus using it |
US20030213514A1 (en) * | 2002-05-17 | 2003-11-20 | Ugur Ortabasi | Concentrating photovoltaic cavity converters for extreme solar-to-electric conversion efficiencies |
US6674562B1 (en) * | 1994-05-05 | 2004-01-06 | Iridigm Display Corporation | Interferometric modulation of radiation |
US6822157B2 (en) * | 2001-10-15 | 2004-11-23 | Sharp Kabushiki Kaisha | Thin film solar battery module |
US20050030732A1 (en) * | 2000-04-12 | 2005-02-10 | Semiconductor Energy Laboratory Co., Ltd., A Japan Corporation | Illumination apparatus |
US6891869B2 (en) * | 1999-06-14 | 2005-05-10 | Quantum Semiconductor Llc | Wavelength-selective photonics device |
US20050117190A1 (en) * | 2002-03-01 | 2005-06-02 | Kenichi Iwauchi | Light emitting device and display unit using the light emitting device and reading device |
US20050133761A1 (en) * | 2003-12-19 | 2005-06-23 | Robbie Thielemans | Broadband full white reflective display structure |
US20050225686A1 (en) * | 2002-05-14 | 2005-10-13 | Hanna Brummack | Device comprising a solar cell arrangement and a liquid crystal display |
US20060002655A1 (en) * | 2004-06-30 | 2006-01-05 | National Semiconductor Corporation, A Delaware Corporation | Apparatus and method for making flexible waveguide substrates for use with light based touch screens |
US20060066541A1 (en) * | 2004-09-27 | 2006-03-30 | Gally Brian J | Method and device for manipulating color in a display |
US20060077617A1 (en) * | 2004-09-27 | 2006-04-13 | Floyd Philip D | Selectable capacitance circuit |
US20060130889A1 (en) * | 2004-12-22 | 2006-06-22 | Motorola, Inc. | Solar panel with optical films |
US20060201546A1 (en) * | 2005-02-28 | 2006-09-14 | Fuji Photo Film Co., Ltd. | Stack type photoelectric conversion device |
US7123216B1 (en) * | 1994-05-05 | 2006-10-17 | Idc, Llc | Photonic MEMS and structures |
US20060262562A1 (en) * | 2005-05-10 | 2006-11-23 | Citizen Electronics Co. Ltd | Multifunctional-type backlight unit and information device using said backlight unit |
US20070113887A1 (en) * | 2005-11-18 | 2007-05-24 | Lih-Hong Laih | Material system of photovoltaic cell with micro-cavity |
US20070125415A1 (en) * | 2005-12-05 | 2007-06-07 | Massachusetts Institute Of Technology | Light capture with patterned solar cell bus wires |
US20070133935A1 (en) * | 2002-12-09 | 2007-06-14 | Eran Fine | Flexible optical device |
US20070171418A1 (en) * | 2002-02-15 | 2007-07-26 | Nyhart Eldon H Jr | Communication Terminal Apparatus And Wireless Transmission Method |
US20070171330A1 (en) * | 2006-01-26 | 2007-07-26 | Chen-Pin Hung | Providing light guide elements in a backlight module |
US20070196040A1 (en) * | 2006-02-17 | 2007-08-23 | Chun-Ming Wang | Method and apparatus for providing back-lighting in an interferometric modulator display device |
US20070235072A1 (en) * | 2006-04-10 | 2007-10-11 | Peter Bermel | Solar cell efficiencies through periodicity |
US20070279935A1 (en) * | 2006-05-31 | 2007-12-06 | 3M Innovative Properties Company | Flexible light guide |
US20070279727A1 (en) * | 2006-06-05 | 2007-12-06 | Pixtronix, Inc. | Display apparatus with optical cavities |
US7327510B2 (en) * | 2004-09-27 | 2008-02-05 | Idc, Llc | Process for modifying offset voltage characteristics of an interferometric modulator |
US20080030650A1 (en) * | 2006-06-30 | 2008-02-07 | Kabushiki Kaisha Toshiba | Illumination apparatus and liquid crystal display apparatus |
US20080105298A1 (en) * | 2006-11-02 | 2008-05-08 | Guardian Industries Corp. | Front electrode for use in photovoltaic device and method of making same |
US20080208517A1 (en) * | 2007-02-23 | 2008-08-28 | Gesturetek, Inc. | Enhanced Single-Sensor Position Detection |
US20090078316A1 (en) * | 2007-09-24 | 2009-03-26 | Qualcomm Incorporated | Interferometric photovoltaic cell |
US20090101192A1 (en) * | 2007-10-19 | 2009-04-23 | Qualcomm Incorporated | Photovoltaic devices with integrated color interferometric film stacks |
US20090103165A1 (en) * | 2007-10-19 | 2009-04-23 | Qualcomm Mems Technologies, Inc. | Display with Integrated Photovoltaics |
US7557935B2 (en) * | 2003-05-19 | 2009-07-07 | Itzhak Baruch | Optical coordinate input device comprising few elements |
US20090231877A1 (en) * | 2006-10-06 | 2009-09-17 | Qualcomm Mems Technologies, Inc. | Thin light bar and method of manufacturing |
US20090231275A1 (en) * | 2005-01-30 | 2009-09-17 | Simtrix Limited | Computer mouse peripheral |
US20090320899A1 (en) * | 2005-08-02 | 2009-12-31 | Saint-Gobain Glass France | Textured plate comprising asymmetrical patterns |
US7701029B2 (en) * | 2002-05-20 | 2010-04-20 | Sony Corporation | Solid-state image pickup device |
US7741144B2 (en) * | 2007-11-02 | 2010-06-22 | Applied Materials, Inc. | Plasma treatment between deposition processes |
US7750886B2 (en) * | 2004-09-27 | 2010-07-06 | Qualcomm Mems Technologies, Inc. | Methods and devices for lighting displays |
US7804023B2 (en) * | 2007-04-19 | 2010-09-28 | Industrial Technology Research Institute | Bifacial thin film solar cell and method for making the same |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1127968A (en) * | 1997-07-02 | 1999-01-29 | Akira Hasegawa | Power generation system |
GB0029340D0 (en) * | 2000-11-30 | 2001-01-17 | Cambridge 3D Display Ltd | Flat panel camera |
JP2007027150A (en) | 2003-06-23 | 2007-02-01 | Hitachi Chem Co Ltd | Concentrating photovoltaic power generation system |
JP2006215509A (en) * | 2005-02-04 | 2006-08-17 | Hiroshi Inoue | Flat backlight of liquid crystal display device |
GB0502453D0 (en) * | 2005-02-05 | 2005-03-16 | Cambridge Flat Projection | Flat panel lens |
US8039731B2 (en) * | 2005-06-06 | 2011-10-18 | General Electric Company | Photovoltaic concentrator for solar energy system |
JP2006065360A (en) * | 2005-11-16 | 2006-03-09 | Omron Corp | Light guide and display apparatus |
JP2007279474A (en) * | 2006-04-10 | 2007-10-25 | Hitachi Displays Ltd | Liquid crystal display device |
-
2007
- 2007-11-16 US US11/941,851 patent/US20090126792A1/en not_active Abandoned
-
2008
- 2008-03-31 EP EP08153694A patent/EP2061093A1/en not_active Withdrawn
- 2008-03-31 EP EP08153692A patent/EP2061092A1/en not_active Withdrawn
- 2008-11-10 JP JP2010534118A patent/JP2011503902A/en active Pending
- 2008-11-10 WO PCT/US2008/083053 patent/WO2009064701A1/en active Application Filing
- 2008-11-10 KR KR1020107013131A patent/KR20100096170A/en not_active Application Discontinuation
- 2008-11-10 CN CN2008801210353A patent/CN101904016A/en active Pending
- 2008-11-14 TW TW097144265A patent/TW200937655A/en unknown
-
2012
- 2012-11-29 JP JP2012260856A patent/JP2013061149A/en active Pending
Patent Citations (81)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2677714A (en) * | 1951-09-21 | 1954-05-04 | Alois Vogt Dr | Optical-electrical conversion device comprising a light-permeable metal electrode |
US3247392A (en) * | 1961-05-17 | 1966-04-19 | Optical Coating Laboratory Inc | Optical coating and assembly used as a band pass interference filter reflecting in the ultraviolet and infrared |
US4154219A (en) * | 1977-03-11 | 1979-05-15 | E-Systems, Inc. | Prismatic solar reflector apparatus and method of solar tracking |
US4116718A (en) * | 1978-03-09 | 1978-09-26 | Atlantic Richfield Company | Photovoltaic array including light diffuser |
US4116718B1 (en) * | 1978-03-09 | 1983-06-07 | ||
US4357486A (en) * | 1978-03-16 | 1982-11-02 | Atlantic Richfield Company | Luminescent solar collector |
US4200472A (en) * | 1978-06-05 | 1980-04-29 | The Regents Of The University Of California | Solar power system and high efficiency photovoltaic cells used therein |
US4282862A (en) * | 1979-11-09 | 1981-08-11 | Soleau Bertrand S | Thin-line collectors |
US4400577A (en) * | 1981-07-16 | 1983-08-23 | Spear Reginald G | Thin solar cells |
US4863224A (en) * | 1981-10-06 | 1989-09-05 | Afian Viktor V | Solar concentrator and manufacturing method therefor |
US4633031A (en) * | 1982-09-24 | 1986-12-30 | Todorof William J | Multi-layer thin film, flexible silicon alloy photovoltaic cell |
US4497974A (en) * | 1982-11-22 | 1985-02-05 | Exxon Research & Engineering Co. | Realization of a thin film solar cell with a detached reflector |
US4688068A (en) * | 1983-07-08 | 1987-08-18 | The United States Of America As Represented By The Department Of Energy | Quantum well multijunction photovoltaic cell |
US5123247A (en) * | 1990-02-14 | 1992-06-23 | 116736 (Canada) Inc. | Solar roof collector |
US5110370A (en) * | 1990-09-20 | 1992-05-05 | United Solar Systems Corporation | Photovoltaic device with decreased gridline shading and method for its manufacture |
US5356488A (en) * | 1991-12-27 | 1994-10-18 | Rudolf Hezel | Solar cell and method for its manufacture |
US5261970A (en) * | 1992-04-08 | 1993-11-16 | Sverdrup Technology, Inc. | Optoelectronic and photovoltaic devices with low-reflectance surfaces |
US5782995A (en) * | 1993-11-05 | 1998-07-21 | Citizen Watch Co., Ltd. | Solar battery device and method of fabricating the same |
US5578140A (en) * | 1994-02-01 | 1996-11-26 | Yeda Research And Development Co., Ltd. | Solar energy plant |
US6040937A (en) * | 1994-05-05 | 2000-03-21 | Etalon, Inc. | Interferometric modulation |
US6674562B1 (en) * | 1994-05-05 | 2004-01-06 | Iridigm Display Corporation | Interferometric modulation of radiation |
US7123216B1 (en) * | 1994-05-05 | 2006-10-17 | Idc, Llc | Photonic MEMS and structures |
US5886688A (en) * | 1995-06-02 | 1999-03-23 | National Semiconductor Corporation | Integrated solar panel and liquid crystal display for portable computer or the like |
US5877874A (en) * | 1995-08-24 | 1999-03-02 | Terrasun L.L.C. | Device for concentrating optical radiation |
US5961198A (en) * | 1996-02-02 | 1999-10-05 | Hitachi, Ltd. | Liquid crystal display device and method of manufacturing backlighting light guide panel therefor |
US5726805A (en) * | 1996-06-25 | 1998-03-10 | Sandia Corporation | Optical filter including a sub-wavelength periodic structure and method of making |
US5782993A (en) * | 1996-06-28 | 1998-07-21 | Ponewash; Jackie | Photovoltaic cells having micro-embossed optical enhancing structures |
US5720827A (en) * | 1996-07-19 | 1998-02-24 | University Of Florida | Design for the fabrication of high efficiency solar cells |
US6123431A (en) * | 1997-03-19 | 2000-09-26 | Sanyo Electric Co., Ltd | Backlight apparatus and light guide plate |
US6008449A (en) * | 1997-08-19 | 1999-12-28 | Cole; Eric D. | Reflective concentrating solar cell assembly |
US6021007A (en) * | 1997-10-18 | 2000-02-01 | Murtha; R. Michael | Side-collecting lightguide |
US20020050286A1 (en) * | 1998-03-25 | 2002-05-02 | Tdk Corporation | Solar battery module |
US6323923B1 (en) * | 1998-04-17 | 2001-11-27 | Seiko Instruments R&D Center Inc. | Reflective type LCD having a solar cell formed of same material and same surface as an active element |
US20010006066A1 (en) * | 1998-07-27 | 2001-07-05 | Matthew Cherney | Solar energy systems and related hardware |
US6323892B1 (en) * | 1998-08-04 | 2001-11-27 | Olympus Optical Co., Ltd. | Display and camera device for videophone and videophone apparatus |
US6323415B1 (en) * | 1998-09-18 | 2001-11-27 | Hitachi, Ltd. | Light concentrator photovoltaic module method of manufacturing same and light concentrator photovoltaic system |
US6300558B1 (en) * | 1999-04-27 | 2001-10-09 | Japan Energy Corporation | Lattice matched solar cell and method for manufacturing the same |
US6891869B2 (en) * | 1999-06-14 | 2005-05-10 | Quantum Semiconductor Llc | Wavelength-selective photonics device |
US6518944B1 (en) * | 1999-10-25 | 2003-02-11 | Kent Displays, Inc. | Combined cholesteric liquid crystal display and solar cell assembly device |
US20030128538A1 (en) * | 2000-02-28 | 2003-07-10 | Masayuki Shinohara | Surface light source, method for manufacturing the same and apparatus using it |
US20050030732A1 (en) * | 2000-04-12 | 2005-02-10 | Semiconductor Energy Laboratory Co., Ltd., A Japan Corporation | Illumination apparatus |
US6580496B2 (en) * | 2000-11-09 | 2003-06-17 | Canesta, Inc. | Systems for CMOS-compatible three-dimensional image sensing using quantum efficiency modulation |
US20030026536A1 (en) * | 2001-08-02 | 2003-02-06 | Edward Ho | Apparatus and method for collecting light |
US6822157B2 (en) * | 2001-10-15 | 2004-11-23 | Sharp Kabushiki Kaisha | Thin film solar battery module |
US20070171418A1 (en) * | 2002-02-15 | 2007-07-26 | Nyhart Eldon H Jr | Communication Terminal Apparatus And Wireless Transmission Method |
US20050117190A1 (en) * | 2002-03-01 | 2005-06-02 | Kenichi Iwauchi | Light emitting device and display unit using the light emitting device and reading device |
US20050225686A1 (en) * | 2002-05-14 | 2005-10-13 | Hanna Brummack | Device comprising a solar cell arrangement and a liquid crystal display |
US20030213514A1 (en) * | 2002-05-17 | 2003-11-20 | Ugur Ortabasi | Concentrating photovoltaic cavity converters for extreme solar-to-electric conversion efficiencies |
US7701029B2 (en) * | 2002-05-20 | 2010-04-20 | Sony Corporation | Solid-state image pickup device |
US20070133935A1 (en) * | 2002-12-09 | 2007-06-14 | Eran Fine | Flexible optical device |
US7557935B2 (en) * | 2003-05-19 | 2009-07-07 | Itzhak Baruch | Optical coordinate input device comprising few elements |
US20050133761A1 (en) * | 2003-12-19 | 2005-06-23 | Robbie Thielemans | Broadband full white reflective display structure |
US20060002655A1 (en) * | 2004-06-30 | 2006-01-05 | National Semiconductor Corporation, A Delaware Corporation | Apparatus and method for making flexible waveguide substrates for use with light based touch screens |
US20060077617A1 (en) * | 2004-09-27 | 2006-04-13 | Floyd Philip D | Selectable capacitance circuit |
US20060066541A1 (en) * | 2004-09-27 | 2006-03-30 | Gally Brian J | Method and device for manipulating color in a display |
US7750886B2 (en) * | 2004-09-27 | 2010-07-06 | Qualcomm Mems Technologies, Inc. | Methods and devices for lighting displays |
US7327510B2 (en) * | 2004-09-27 | 2008-02-05 | Idc, Llc | Process for modifying offset voltage characteristics of an interferometric modulator |
US20060130889A1 (en) * | 2004-12-22 | 2006-06-22 | Motorola, Inc. | Solar panel with optical films |
US20090231275A1 (en) * | 2005-01-30 | 2009-09-17 | Simtrix Limited | Computer mouse peripheral |
US20060201546A1 (en) * | 2005-02-28 | 2006-09-14 | Fuji Photo Film Co., Ltd. | Stack type photoelectric conversion device |
US20060262562A1 (en) * | 2005-05-10 | 2006-11-23 | Citizen Electronics Co. Ltd | Multifunctional-type backlight unit and information device using said backlight unit |
US20090320899A1 (en) * | 2005-08-02 | 2009-12-31 | Saint-Gobain Glass France | Textured plate comprising asymmetrical patterns |
US20070113887A1 (en) * | 2005-11-18 | 2007-05-24 | Lih-Hong Laih | Material system of photovoltaic cell with micro-cavity |
US20070125415A1 (en) * | 2005-12-05 | 2007-06-07 | Massachusetts Institute Of Technology | Light capture with patterned solar cell bus wires |
US20070171330A1 (en) * | 2006-01-26 | 2007-07-26 | Chen-Pin Hung | Providing light guide elements in a backlight module |
US20070196040A1 (en) * | 2006-02-17 | 2007-08-23 | Chun-Ming Wang | Method and apparatus for providing back-lighting in an interferometric modulator display device |
US20070235072A1 (en) * | 2006-04-10 | 2007-10-11 | Peter Bermel | Solar cell efficiencies through periodicity |
US20070279935A1 (en) * | 2006-05-31 | 2007-12-06 | 3M Innovative Properties Company | Flexible light guide |
US20070279727A1 (en) * | 2006-06-05 | 2007-12-06 | Pixtronix, Inc. | Display apparatus with optical cavities |
US20080030650A1 (en) * | 2006-06-30 | 2008-02-07 | Kabushiki Kaisha Toshiba | Illumination apparatus and liquid crystal display apparatus |
US20090231877A1 (en) * | 2006-10-06 | 2009-09-17 | Qualcomm Mems Technologies, Inc. | Thin light bar and method of manufacturing |
US20080105298A1 (en) * | 2006-11-02 | 2008-05-08 | Guardian Industries Corp. | Front electrode for use in photovoltaic device and method of making same |
US20080208517A1 (en) * | 2007-02-23 | 2008-08-28 | Gesturetek, Inc. | Enhanced Single-Sensor Position Detection |
US7804023B2 (en) * | 2007-04-19 | 2010-09-28 | Industrial Technology Research Institute | Bifacial thin film solar cell and method for making the same |
US20090078316A1 (en) * | 2007-09-24 | 2009-03-26 | Qualcomm Incorporated | Interferometric photovoltaic cell |
US20100236624A1 (en) * | 2007-09-24 | 2010-09-23 | Qualcomm Mems Technologies, Inc. | Interferometric photovoltaic cell |
US20090103161A1 (en) * | 2007-10-19 | 2009-04-23 | Qualcomm Mems Technologies, Inc. | Display with integrated photovoltaic device |
US20090103165A1 (en) * | 2007-10-19 | 2009-04-23 | Qualcomm Mems Technologies, Inc. | Display with Integrated Photovoltaics |
US20090101192A1 (en) * | 2007-10-19 | 2009-04-23 | Qualcomm Incorporated | Photovoltaic devices with integrated color interferometric film stacks |
US20100284055A1 (en) * | 2007-10-19 | 2010-11-11 | Qualcomm Mems Technologies, Inc. | Display with integrated photovoltaic device |
US7741144B2 (en) * | 2007-11-02 | 2010-06-22 | Applied Materials, Inc. | Plasma treatment between deposition processes |
Cited By (188)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7907319B2 (en) | 1995-11-06 | 2011-03-15 | Qualcomm Mems Technologies, Inc. | Method and device for modulating light with optical compensation |
US8928967B2 (en) | 1998-04-08 | 2015-01-06 | Qualcomm Mems Technologies, Inc. | Method and device for modulating light |
US9110289B2 (en) | 1998-04-08 | 2015-08-18 | Qualcomm Mems Technologies, Inc. | Device for modulating light with multiple electrodes |
US9025235B2 (en) | 2002-12-25 | 2015-05-05 | Qualcomm Mems Technologies, Inc. | Optical interference type of color display having optical diffusion layer between substrate and electrode |
US9019590B2 (en) | 2004-02-03 | 2015-04-28 | Qualcomm Mems Technologies, Inc. | Spatial light modulator with integrated optical compensation structure |
US8045252B2 (en) | 2004-02-03 | 2011-10-25 | Qualcomm Mems Technologies, Inc. | Spatial light modulator with integrated optical compensation structure |
US8111445B2 (en) | 2004-02-03 | 2012-02-07 | Qualcomm Mems Technologies, Inc. | Spatial light modulator with integrated optical compensation structure |
US7706050B2 (en) | 2004-03-05 | 2010-04-27 | Qualcomm Mems Technologies, Inc. | Integrated modulator illumination |
US7710636B2 (en) | 2004-09-27 | 2010-05-04 | Qualcomm Mems Technologies, Inc. | Systems and methods using interferometric optical modulators and diffusers |
US20060066783A1 (en) * | 2004-09-27 | 2006-03-30 | Sampsell Jeffrey B | Methods and devices for lighting displays |
US20100172012A1 (en) * | 2004-09-27 | 2010-07-08 | Idc, Llc | System and method of reducing color shift in a display |
US8111446B2 (en) | 2004-09-27 | 2012-02-07 | Qualcomm Mems Technologies, Inc. | Optical films for controlling angular characteristics of displays |
US7750886B2 (en) | 2004-09-27 | 2010-07-06 | Qualcomm Mems Technologies, Inc. | Methods and devices for lighting displays |
US8861071B2 (en) | 2004-09-27 | 2014-10-14 | Qualcomm Mems Technologies, Inc. | Method and device for compensating for color shift as a function of angle of view |
US20060066511A1 (en) * | 2004-09-27 | 2006-03-30 | Clarence Chui | Systems and methods using interferometric optical modulators and diffusers |
US8169688B2 (en) | 2004-09-27 | 2012-05-01 | Qualcomm Mems Technologies, Inc. | System and method of reducing color shift in a display |
US20060077522A1 (en) * | 2004-09-27 | 2006-04-13 | Manish Kothari | Method and device for compensating for color shift as a function of angle of view |
US8971675B2 (en) | 2006-01-13 | 2015-03-03 | Qualcomm Mems Technologies, Inc. | Interconnect structure for MEMS device |
US7933475B2 (en) | 2006-02-17 | 2011-04-26 | Qualcomm Mems Technologies, Inc. | Method and apparatus for providing back-lighting in a display device |
US20090310208A1 (en) * | 2006-02-17 | 2009-12-17 | Qualcomm Mems Technologies, Inc. | Method and apparatus for providing back-lighting in a display device |
US7766498B2 (en) | 2006-06-21 | 2010-08-03 | Qualcomm Mems Technologies, Inc. | Linear solid state illuminator |
US20090140962A1 (en) * | 2006-08-17 | 2009-06-04 | Hyun Ha Hwang | Display Device and Mobile Terminal Having the Same |
US8188954B2 (en) * | 2006-08-17 | 2012-05-29 | Lg Display Co., Ltd. | Display device and mobile terminal having the same |
US20080049450A1 (en) * | 2006-08-28 | 2008-02-28 | Sampsell Jeffrey B | Angle sweeping holographic illuminator |
US7845841B2 (en) | 2006-08-28 | 2010-12-07 | Qualcomm Mems Technologies, Inc. | Angle sweeping holographic illuminator |
US8872085B2 (en) | 2006-10-06 | 2014-10-28 | Qualcomm Mems Technologies, Inc. | Display device having front illuminator with turning features |
US7855827B2 (en) | 2006-10-06 | 2010-12-21 | Qualcomm Mems Technologies, Inc. | Internal optical isolation structure for integrated front or back lighting |
US20080084602A1 (en) * | 2006-10-06 | 2008-04-10 | Gang Xu | Internal optical isolation structure for integrated front or back lighting |
US8107155B2 (en) | 2006-10-06 | 2012-01-31 | Qualcomm Mems Technologies, Inc. | System and method for reducing visual artifacts in displays |
US20100141557A1 (en) * | 2006-10-06 | 2010-06-10 | Qualcomm Mems Technologies, Inc. | Light guide |
US9019183B2 (en) | 2006-10-06 | 2015-04-28 | Qualcomm Mems Technologies, Inc. | Optical loss structure integrated in an illumination apparatus |
US8368981B2 (en) | 2006-10-10 | 2013-02-05 | Qualcomm Mems Technologies, Inc. | Display device with diffractive optics |
US7864395B2 (en) | 2006-10-27 | 2011-01-04 | Qualcomm Mems Technologies, Inc. | Light guide including optical scattering elements and a method of manufacture |
US7777954B2 (en) * | 2007-01-30 | 2010-08-17 | Qualcomm Mems Technologies, Inc. | Systems and methods of providing a light guiding layer |
US7733439B2 (en) | 2007-04-30 | 2010-06-08 | Qualcomm Mems Technologies, Inc. | Dual film light guide for illuminating displays |
US20080267572A1 (en) * | 2007-04-30 | 2008-10-30 | Qualcomm Mems Technologies, Inc. | Dual film light guide for illuminating displays |
US20110162713A1 (en) * | 2007-05-01 | 2011-07-07 | Morgan Solar Inc. | Light-guide solar panel and method of fabrication thereof |
US9337373B2 (en) | 2007-05-01 | 2016-05-10 | Morgan Solar Inc. | Light-guide solar module, method of fabrication thereof, and panel made therefrom |
US9335530B2 (en) | 2007-05-01 | 2016-05-10 | Morgan Solar Inc. | Planar solar energy concentrator |
US7873257B2 (en) | 2007-05-01 | 2011-01-18 | Morgan Solar Inc. | Light-guide solar panel and method of fabrication thereof |
US9040808B2 (en) | 2007-05-01 | 2015-05-26 | Morgan Solar Inc. | Light-guide solar panel and method of fabrication thereof |
US7991261B2 (en) * | 2007-05-01 | 2011-08-02 | Morgan Solar Inc. | Light-guide solar panel and method of fabrication thereof |
US8152339B2 (en) | 2007-05-01 | 2012-04-10 | Morgan Solar Inc. | Illumination device |
US8797628B2 (en) | 2007-10-19 | 2014-08-05 | Qualcomm Memstechnologies, Inc. | Display with integrated photovoltaic device |
US8941631B2 (en) | 2007-11-16 | 2015-01-27 | Qualcomm Mems Technologies, Inc. | Simultaneous light collection and illumination on an active display |
US8798425B2 (en) | 2007-12-07 | 2014-08-05 | Qualcomm Mems Technologies, Inc. | Decoupled holographic film and diffuser |
US8068710B2 (en) | 2007-12-07 | 2011-11-29 | Qualcomm Mems Technologies, Inc. | Decoupled holographic film and diffuser |
US20090151771A1 (en) * | 2007-12-17 | 2009-06-18 | Qualcomm Mems Technologies, Inc. | Photovoltaics with interferometric ribbon masks |
US8193441B2 (en) | 2007-12-17 | 2012-06-05 | Qualcomm Mems Technologies, Inc. | Photovoltaics with interferometric ribbon masks |
US20090242024A1 (en) * | 2007-12-17 | 2009-10-01 | Qualcomm Mems Technologies, Inc. | Photovoltaics with interferometric back side masks |
US8300304B2 (en) | 2008-02-12 | 2012-10-30 | Qualcomm Mems Technologies, Inc. | Integrated front light diffuser for reflective displays |
US20090201571A1 (en) * | 2008-02-12 | 2009-08-13 | Qualcomm Mems Technologies, Inc. | Integrated front light diffuser for reflective displays |
US8040589B2 (en) | 2008-02-12 | 2011-10-18 | Qualcomm Mems Technologies, Inc. | Devices and methods for enhancing brightness of displays using angle conversion layers |
US20090199900A1 (en) * | 2008-02-12 | 2009-08-13 | Qualcomm Mems Technologies, Inc. | Thin film holographic solar concentrator/collector |
US20090199893A1 (en) * | 2008-02-12 | 2009-08-13 | Qualcomm Mems Technologies, Inc. | Thin film holographic solar concentrator/collector |
US20090255569A1 (en) * | 2008-04-11 | 2009-10-15 | Qualcomm Mems Technologies, Inc. | Method to improve pv aesthetics and efficiency |
US8049951B2 (en) | 2008-04-15 | 2011-11-01 | Qualcomm Mems Technologies, Inc. | Light with bi-directional propagation |
US20090257108A1 (en) * | 2008-04-15 | 2009-10-15 | Qualcomm Mems Technologies, Inc. | Light with bi-directional propagation |
US20090296193A1 (en) * | 2008-05-28 | 2009-12-03 | Qualcomm Mems Technologies, Inc. | Front Light Devices and Methods of Fabrication Thereof |
US8346048B2 (en) | 2008-05-28 | 2013-01-01 | Qualcomm Mems Technologies, Inc. | Front light devices and methods of fabrication thereof |
US8358266B2 (en) | 2008-09-02 | 2013-01-22 | Qualcomm Mems Technologies, Inc. | Light turning device with prismatic light turning features |
US20100051089A1 (en) * | 2008-09-02 | 2010-03-04 | Qualcomm Mems Technologies, Inc. | Light collection device with prismatic light turning features |
US20100180946A1 (en) * | 2008-09-18 | 2010-07-22 | Qualcomm Mems Technologies, Inc. | Increasing the angular range of light collection in solar collectors/concentrators |
US20100108056A1 (en) * | 2008-11-06 | 2010-05-06 | Industrial Technology Research Institute | Solar energy collecting module |
US9960296B2 (en) * | 2008-11-06 | 2018-05-01 | Industrial Technology Research Institute | Solar energy collecting module |
US20110232721A1 (en) * | 2009-01-16 | 2011-09-29 | Genie Lens Technologies, Llc | Photovoltaic (pv) enhancement films or protective covers for enhancing solar cell efficiences |
US20100181014A1 (en) * | 2009-01-16 | 2010-07-22 | Genie Lens Technologies, Llc | Method of manufacturing photovoltaic (pv) enhancement films |
US7968790B2 (en) * | 2009-01-16 | 2011-06-28 | Genie Lens Technologies, Llc | Photovoltaic (PV) enhancement films for enhancing optical path lengths and for trapping reflected light |
US8921681B2 (en) | 2009-01-16 | 2014-12-30 | Glt Future, Llc | Photovoltaic (PV) enhancement films or protective covers for enhancing solar cell efficiences |
US20100180929A1 (en) * | 2009-01-16 | 2010-07-22 | Genie Lens Technologies, Llc | Photovoltaic (pv) enhancement films for enhancing optical path lengths and for trapping reflected light |
US8338693B2 (en) * | 2009-01-16 | 2012-12-25 | Genie Lens Technology, LLC | Solar arrays and other photovoltaic (PV) devices using PV enhancement films for trapping light |
US8048250B2 (en) * | 2009-01-16 | 2011-11-01 | Genie Lens Technologies, Llc | Method of manufacturing photovoltaic (PV) enhancement films |
US20100180928A1 (en) * | 2009-01-16 | 2010-07-22 | Genie Lens Technologies, Llc | Solar arrays and other photovoltaic (pv) devices using pv enhancement films for trapping light |
US10797191B2 (en) | 2009-04-21 | 2020-10-06 | Svv Technology Innovations, Inc. | Light trapping optical structure |
US20100278480A1 (en) * | 2009-04-21 | 2010-11-04 | Vasylyev Sergiy V | Light collection and illumination systems employing planar waveguide |
US9880342B2 (en) * | 2009-04-21 | 2018-01-30 | Svv Technology Innovations, Inc. | Collimating illumination systems employing planar waveguide |
US10627562B2 (en) | 2009-04-21 | 2020-04-21 | Svv Technology Innovations, Inc. | Illumination system using edge-lit waveguide and microstructured surfaces |
US10838135B2 (en) | 2009-04-21 | 2020-11-17 | Svv Technology Innovations, Inc. | Edge-lit waveguide illumination systems employing planar arrays of linear cylindrical lenses |
US9678321B2 (en) | 2009-04-21 | 2017-06-13 | Svv Technology Innovations, Inc. | Light trapping optical structure |
US10613306B2 (en) | 2009-04-21 | 2020-04-07 | Svv Technology Innovations, Inc. | Light distribution system employing planar microstructured waveguide |
US8290318B2 (en) | 2009-04-21 | 2012-10-16 | Svv Technology Innovations, Inc. | Light trapping optical cover |
US9256007B2 (en) * | 2009-04-21 | 2016-02-09 | Svv Technology Innovations, Inc. | Light collection and illumination systems employing planar waveguide |
US20160097890A1 (en) * | 2009-04-21 | 2016-04-07 | Sergiy Vasylyev | Collimating illumination systems employing planar waveguide |
US20120038841A1 (en) * | 2009-04-24 | 2012-02-16 | Alphamicron, Inc. | Solar powered variable light attenuating devices and arrangements |
US9130097B2 (en) * | 2009-04-24 | 2015-09-08 | Alphamicron Incorporated | Solar powered variable light attenuating devices and arrangements |
US20100281721A1 (en) * | 2009-05-06 | 2010-11-11 | Industrial Technology Research Institute | Multi-function solar-powered lighting system |
US20100282296A1 (en) * | 2009-05-06 | 2010-11-11 | Industrial Technology Research Institute | Solar Energy Module |
US8809670B2 (en) * | 2009-05-06 | 2014-08-19 | Industrial Technology Research Institute | Solar energy module |
US8277072B2 (en) * | 2009-05-06 | 2012-10-02 | Industrial Technology Research Institute | Multi-function solar-powered lighting system |
US8979349B2 (en) | 2009-05-29 | 2015-03-17 | Qualcomm Mems Technologies, Inc. | Illumination devices and methods of fabrication thereof |
US9121979B2 (en) | 2009-05-29 | 2015-09-01 | Qualcomm Mems Technologies, Inc. | Illumination devices and methods of fabrication thereof |
US8498505B2 (en) | 2009-06-24 | 2013-07-30 | University Of Rochester | Dimpled light collection and concentration system, components thereof, and methods |
WO2010151253A1 (en) * | 2009-06-24 | 2010-12-29 | University Of Rochester | Dimpled light collection and concentration system, components thereof, and methods |
US20100329619A1 (en) * | 2009-06-24 | 2010-12-30 | University Of Rochester | Dimpled Light Collection and Concentration System, Components Thereof, and Methods |
CN102483484A (en) * | 2009-06-24 | 2012-05-30 | 罗切斯特大学 | Dimpled light collection and concentration system, components thereof, and methods |
US9036963B2 (en) * | 2009-06-24 | 2015-05-19 | University Of Rochester | Light collecting and emitting apparatus, method, and applications |
US20120294578A1 (en) * | 2009-06-24 | 2012-11-22 | Rambus Inc. | Light collecting and emitting apparatus, method, and applications |
US20110005595A1 (en) * | 2009-07-13 | 2011-01-13 | Yu-Chih Yang | Solar cell module and the fabrication method of the same |
US20110079267A1 (en) * | 2009-10-02 | 2011-04-07 | Genie Lens Technologies, Llc | Lens system with directional ray splitter for concentrating solar energy |
US20120199198A1 (en) * | 2009-10-26 | 2012-08-09 | Hebrink Timothy J | Structured film and articles made therefrom |
KR101118443B1 (en) | 2010-01-26 | 2012-03-06 | 박기성 | Concentrated solar cell module |
US20130133736A1 (en) * | 2010-03-16 | 2013-05-30 | Koninklijke Philips Electronics N.V. | Photovoltaic cell device with switchable lighting/reflection |
US9905709B2 (en) * | 2010-03-16 | 2018-02-27 | Philips Lighting Holdings B.V. | Photovoltaic cell device with switchable lighting/reflection |
WO2011083907A2 (en) * | 2010-05-07 | 2011-07-14 | Jung Taerok | Light guide device having plurality of channels |
WO2011083907A3 (en) * | 2010-05-07 | 2011-09-29 | Jung Taerok | Light guide device having plurality of channels |
US8755665B2 (en) | 2010-06-30 | 2014-06-17 | Epistar Corporation | Electromagnetic wave gathering device and solar cell module having the same |
US10439088B2 (en) | 2010-07-13 | 2019-10-08 | Svv Technology Innovations, Inc. | Light converting system employing planar light trapping and light absorbing structures |
US11923475B2 (en) | 2010-07-13 | 2024-03-05 | S.V.V. Technology Innovations, Inc. | Method of making light converting systems using thin light trapping structures and photoabsorptive films |
US11616157B2 (en) | 2010-07-13 | 2023-03-28 | S.V.V. Technology Innovations, Inc. | Method of making light converting systems using thin light absorbing and light trapping structures |
US11276795B2 (en) | 2010-07-13 | 2022-03-15 | S.V.V. Technology Innovations, Inc. | Light converting systems employing thin light absorbing and light trapping structures with lens arrays |
US10868205B2 (en) | 2010-07-13 | 2020-12-15 | Sw Technology Innovations, Inc. | Light converting system employing planar light trapping and light absorbing structures |
US10439089B2 (en) | 2010-07-13 | 2019-10-08 | Svv Technology Innovations, Inc. | Light converting system employing planar light trapping and light absorbing structures |
US10269999B2 (en) | 2010-07-13 | 2019-04-23 | Svv Technology Innovations, Inc. | Light trapping optical structures employing light converting and light guiding layers |
US8735791B2 (en) | 2010-07-13 | 2014-05-27 | Svv Technology Innovations, Inc. | Light harvesting system employing microstructures for efficient light trapping |
CN102376784A (en) * | 2010-08-23 | 2012-03-14 | 晶元光电股份有限公司 | Solar cell module and electromagnetic wave collecting device thereof |
CN103227215A (en) * | 2010-08-23 | 2013-07-31 | 晶元光电股份有限公司 | Solar cell module and electromagnetic wave collecting device thereof |
US9658391B2 (en) * | 2010-10-11 | 2017-05-23 | 3M Innovative Properties Company | Illumination device having viscoelastic lightguide |
US9310551B2 (en) | 2010-10-11 | 2016-04-12 | 3M Innovative Properties Company | Illumination device having viscoelastic lightguide |
JP2013543150A (en) * | 2010-11-04 | 2013-11-28 | バニヤン エナジー インコーポレイテッド | Compact optical components for heat collection and lighting systems |
US20130233372A1 (en) * | 2010-11-22 | 2013-09-12 | Sharp Kabushiki Kaisha | Solar cell module and solar power generation apparatus |
US9087949B2 (en) * | 2010-11-22 | 2015-07-21 | Sharp Kabushiki Kaisha | Solar cell module and solar power generation apparatus |
US20130240037A1 (en) * | 2010-11-24 | 2013-09-19 | Sharp Kabushiki Kaisha | Solar cell module and solar generator |
US20120134243A1 (en) * | 2010-11-29 | 2012-05-31 | Casio Computer Co., Ltd. | Electronic device and watch |
US8897101B2 (en) * | 2010-12-07 | 2014-11-25 | Seiko Epson Corporation | Timepiece faceplate and timepiece |
US20120140604A1 (en) * | 2010-12-07 | 2012-06-07 | Seiko Epson Corporation | Timepiece faceplate and timepiece |
US8902484B2 (en) | 2010-12-15 | 2014-12-02 | Qualcomm Mems Technologies, Inc. | Holographic brightness enhancement film |
US20120155225A1 (en) * | 2010-12-20 | 2012-06-21 | Seiko Epson Corporation | Timepiece faceplate and timepiece |
US8976632B2 (en) * | 2010-12-20 | 2015-03-10 | Seiko Epson Corporation | Timepiece faceplate and timepiece |
US20120163135A1 (en) * | 2010-12-27 | 2012-06-28 | Seiko Epson Corporation | Timepiece faceplate, and timepiece |
US8740397B2 (en) | 2011-01-18 | 2014-06-03 | Svv Technology Innovations, Inc. | Optical cover employing microstructured surfaces |
US8885995B2 (en) | 2011-02-07 | 2014-11-11 | Morgan Solar Inc. | Light-guide solar energy concentrator |
US20120214556A1 (en) * | 2011-02-17 | 2012-08-23 | Nokia Corporation | Method and Apparatus for Solar Cell Light Concentrator Panel |
US20120234371A1 (en) * | 2011-03-18 | 2012-09-20 | Tong Zhang | Incident angle dependent smart solar concentrator |
US9496443B2 (en) | 2011-04-22 | 2016-11-15 | Sharp Kabushiki Kaisha | Solar cell module and solar power generation apparatus |
US8970767B2 (en) | 2011-06-21 | 2015-03-03 | Qualcomm Mems Technologies, Inc. | Imaging method and system with angle-discrimination layer |
US8917579B2 (en) * | 2011-08-18 | 2014-12-23 | Seiko Epson Corporation | Manufacturing method of timepiece dial, timepiece dial, and timepiece |
US20130044573A1 (en) * | 2011-08-18 | 2013-02-21 | Seiko Epson Corporation | Manufacturing method of timepiece dial, timepiece dial, and timepiece |
US20130051196A1 (en) * | 2011-08-25 | 2013-02-28 | Seiko Epson Corporation | Timepiece dial and timepiece |
US20130064048A1 (en) * | 2011-09-12 | 2013-03-14 | Seiko Epson Corporation | Timepiece dial, and timepiece |
US20130070574A1 (en) * | 2011-09-15 | 2013-03-21 | Seiko Epson Corporation | Timepiece rotating display member, and timepiece |
US8657479B2 (en) | 2012-03-21 | 2014-02-25 | Morgan Solar Inc. | Light guide illumination devices |
US8328403B1 (en) | 2012-03-21 | 2012-12-11 | Morgan Solar Inc. | Light guide illumination devices |
US20130319505A1 (en) * | 2012-06-05 | 2013-12-05 | Qualcomm Mems Technologies, Inc | Photovoltaic power generating window |
US20130333742A1 (en) * | 2012-06-15 | 2013-12-19 | Chi Lin Technology Co., Ltd. | Power generating window set and power generating module thereof |
US9780233B2 (en) | 2012-08-10 | 2017-10-03 | Sharp Kabushiki Kaisha | Solar cell module, solar cell module assembly, and solar photovoltaic power generation system |
TWI491932B (en) * | 2012-10-24 | 2015-07-11 | Univ Nat Central | Light guide device |
US20140158197A1 (en) * | 2012-12-07 | 2014-06-12 | Qualcomm Mems Technologies, Inc. | Tri-functional light and energy generating panel system |
US9595912B2 (en) | 2012-12-19 | 2017-03-14 | Kabushiki Kaisha Toshiba | Light concentrator and a solar cell |
WO2014116498A1 (en) | 2013-01-23 | 2014-07-31 | Dow Global Technologies Llc | Solar waveguide concentrator |
US20140261621A1 (en) * | 2013-03-14 | 2014-09-18 | Qualcomm Mems Technologies, Inc. | Window solar harvesting means |
US9442241B2 (en) | 2013-03-15 | 2016-09-13 | Morgan Solar Inc. | Optics for illumination devices |
US9435934B2 (en) | 2013-03-15 | 2016-09-06 | Morgan Solar Inc. | Optics for solar concentrators |
US9464783B2 (en) | 2013-03-15 | 2016-10-11 | John Paul Morgan | Concentrated photovoltaic panel |
WO2014176251A1 (en) * | 2013-04-23 | 2014-10-30 | Lumenco, Llc | Multi-layered waveguide for capturing solar energy |
US9477033B2 (en) | 2013-04-23 | 2016-10-25 | Lumenco, Llc | Multi-layered waveguide for capturing solar energy |
CN110094887A (en) * | 2013-07-01 | 2019-08-06 | 3M创新有限公司 | Solar energy equipment |
US20160154484A1 (en) * | 2013-07-17 | 2016-06-02 | Stabilo International Gmbh | Energy Savings in an Electronic Pen |
US20160268467A1 (en) * | 2013-11-22 | 2016-09-15 | Massachusetts Institute Of Technology | Metallic photovoltaics |
US10340698B2 (en) | 2014-05-14 | 2019-07-02 | California Institute Of Technology | Large-scale space-based solar power station: packaging, deployment and stabilization of lightweight structures |
US10144533B2 (en) | 2014-05-14 | 2018-12-04 | California Institute Of Technology | Large-scale space-based solar power station: multi-scale modular space power |
US20160376037A1 (en) | 2014-05-14 | 2016-12-29 | California Institute Of Technology | Large-Scale Space-Based Solar Power Station: Packaging, Deployment and Stabilization of Lightweight Structures |
US11128179B2 (en) | 2014-05-14 | 2021-09-21 | California Institute Of Technology | Large-scale space-based solar power station: power transmission using steerable beams |
US11362228B2 (en) | 2014-06-02 | 2022-06-14 | California Institute Of Technology | Large-scale space-based solar power station: efficient power generation tiles |
US11063106B2 (en) | 2015-02-09 | 2021-07-13 | Samsung Display Co., Ltd. | Top emission device and organic light-emitting diode display device |
US10696428B2 (en) | 2015-07-22 | 2020-06-30 | California Institute Of Technology | Large-area structures for compact packaging |
US10992253B2 (en) | 2015-08-10 | 2021-04-27 | California Institute Of Technology | Compactable power generation arrays |
US10749593B2 (en) | 2015-08-10 | 2020-08-18 | California Institute Of Technology | Systems and methods for controlling supply voltages of stacked power amplifiers |
US10454565B2 (en) | 2015-08-10 | 2019-10-22 | California Institute Of Technology | Systems and methods for performing shape estimation using sun sensors in large-scale space-based solar power stations |
US11359796B2 (en) | 2016-03-08 | 2022-06-14 | Korrus, Inc. | Lighting system with lens assembly |
US11867382B2 (en) | 2016-03-08 | 2024-01-09 | Korrus, Inc. | Lighting system with lens assembly |
US11512838B2 (en) | 2016-03-08 | 2022-11-29 | Korrus, Inc. | Lighting system with lens assembly |
US10794557B2 (en) | 2016-11-03 | 2020-10-06 | Basf Se | Daylighting panel |
US11209142B2 (en) | 2016-11-03 | 2021-12-28 | Skynative UG | Daylighting illumination system |
US10718479B2 (en) | 2016-11-03 | 2020-07-21 | Basf Se | Daylighting illumination system |
US11296057B2 (en) | 2017-01-27 | 2022-04-05 | EcoSense Lighting, Inc. | Lighting systems with high color rendering index and uniform planar illumination |
US11658163B2 (en) | 2017-01-27 | 2023-05-23 | Korrus, Inc. | Lighting systems with high color rendering index and uniform planar illumination |
US11339932B2 (en) | 2017-03-09 | 2022-05-24 | Korrus, Inc. | Fixtures and lighting accessories for lighting devices |
US11578857B2 (en) | 2018-05-01 | 2023-02-14 | Korrus, Inc. | Lighting systems and devices with central silicone module |
US11634240B2 (en) | 2018-07-17 | 2023-04-25 | California Institute Of Technology | Coilable thin-walled longerons and coilable structures implementing longerons and methods for their manufacture and coiling |
US11772826B2 (en) | 2018-10-31 | 2023-10-03 | California Institute Of Technology | Actively controlled spacecraft deployment mechanism |
US11353200B2 (en) | 2018-12-17 | 2022-06-07 | Korrus, Inc. | Strip lighting system for direct input of high voltage driving power |
US11708966B2 (en) | 2018-12-17 | 2023-07-25 | Korrus, Inc. | Strip lighting system for direct input of high voltage driving power |
US20200209637A1 (en) * | 2018-12-27 | 2020-07-02 | Sl Corporation | Lamp for vehicle |
US10996486B2 (en) * | 2018-12-27 | 2021-05-04 | Sl Corporation | Lamp for vehicle |
US11456397B2 (en) | 2019-03-12 | 2022-09-27 | E Ink Corporation | Energy harvesting electro-optic displays |
US11616162B2 (en) | 2019-03-12 | 2023-03-28 | E Ink Corporation | Energy harvesting electro-optic displays |
DE102020133069B4 (en) | 2020-12-11 | 2023-08-17 | Audi Aktiengesellschaft | Panoramic roof with a transparent solar panel |
DE102020133069A1 (en) | 2020-12-11 | 2022-06-15 | Audi Aktiengesellschaft | Transparent solar panel |
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JP2011503902A (en) | 2011-01-27 |
WO2009064701A1 (en) | 2009-05-22 |
CN101904016A (en) | 2010-12-01 |
TW200937655A (en) | 2009-09-01 |
KR20100096170A (en) | 2010-09-01 |
JP2013061149A (en) | 2013-04-04 |
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EP2061092A1 (en) | 2009-05-20 |
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